All airlines flying from Seattle-Tacoma (SEA) to Boston Logan (BOS).

FLIGHT SCHEDULE
Direct Codeshare Flights:
Fri,Sat 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 (73J) 5:21 Effective 2026-02-13 through 2026-02-27 Codeshare flight, operated by Alaska Airlines.(AS 306)
Wed 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 MAX 8 (7M8) 5:21 Effective 2026-02-18 through 2026-03-04 Codeshare flight, operated by Alaska Airlines.(AS 306)
Mon,Tue,Thu,Sat,Sun 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 MAX 9 (7M9) 5:21 Effective 2026-02-28 through 2026-03-05 Codeshare flight, operated by Alaska Airlines.(AS 306)
Fri 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 (73J) 5:21 Operates only on 2026-03-06 Codeshare flight, operated by Alaska Airlines.(AS 306)
Mon-Wed,Sun 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 MAX 9 (7M9) 5:21 Effective 2026-03-08 through 2026-03-15 Codeshare flight, operated by Alaska Airlines.(AS 306)
Mon,Thu 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 (73J) 5:21 Effective 2026-03-12 through 2026-03-16 Codeshare flight, operated by Alaska Airlines.(AS 306)
Fri 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 MAX 8 (7M8) 5:21 Operates only on 2026-03-13 Codeshare flight, operated by Alaska Airlines.(AS 306)
Tue 08:15 Seattle-Tacoma (SEA) 16:36 Boston Logan (BOS) B Qatar Airways QR 2977 Non-stop Boeing 737 MAX 9 (7M9) 5:21 Operates only on 2026-03-17 Codeshare flight, operated by Alaska Airlines.(AS 306)
Mon,Thu,Fri 23:25 Seattle-Tacoma (SEA) 07:48 Boston Logan (BOS) B Qatar Airways QR 2989 Non-stop Boeing 737-800 (73H) 5:23 Valid until 2026-01-05 Codeshare flight, operated by Alaska Airlines.(AS 214) The flight arrives 1 day after departure.
Wed,Sat 23:25 Seattle-Tacoma (SEA) 07:48 Boston Logan (BOS) B Qatar Airways QR 2989 Non-stop Boeing 737 MAX 9 (7M9) 5:23 Valid until 2026-01-03 Codeshare flight, operated by Alaska Airlines.(AS 214) The flight arrives 1 day after departure.
Sun 23:25 Seattle-Tacoma (SEA) 07:48 Boston Logan (BOS) B Qatar Airways QR 2989 Non-stop Boeing 737 MAX 8 (7M8) 5:23 Operates only on 2026-01-04 Codeshare flight, operated by Alaska Airlines.(AS 214) The flight arrives 1 day after departure.
Daily 11:50 Seattle-Tacoma (SEA) 20:23 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:33 Effective from 2026-10-25 Codeshare flight, operated by Delta Air Lines.(DL 438)
Mon-Fri,Sun 15:43 Seattle-Tacoma (SEA) 23:58 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:15 Effective 2026-03-08 through 2026-03-13 Codeshare flight, operated by Delta Air Lines.(DL 474)
Mon-Fri,Sun 15:43 Seattle-Tacoma (SEA) 23:59 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:16 Effective 2026-03-15 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 474)
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-04-13 through 2026-05-22 Codeshare flight, operated by Delta Air Lines.(DL 474) The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-05-25 through 2026-09-04 Codeshare flight, operated by Delta Air Lines.(DL 474) The flight arrives 1 day after departure.
Sun 15:55 Seattle-Tacoma (SEA) 00:27 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:32 Operates only on 2026-09-06 Codeshare flight, operated by Delta Air Lines.(DL 474) The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-09-07 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 474) The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:20 Boston Logan (BOS) A Korean Air KE 3009 Non-stop Airbus A321neo (32Q) 5:25 Effective 2026-10-06 through 2026-10-23 Codeshare flight, operated by Delta Air Lines.(DL 474) The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 06:35 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:35 Effective 2026-04-13 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 06:33 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:33 Effective from 2026-10-06 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 22:20 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:30 Effective 2026-02-12 through 2026-03-06 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Sat 22:20 Seattle-Tacoma (SEA) 07:48 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:28 Operates only on 2026-03-07 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Mon-Thu,Sat,Sun 22:25 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:25 Effective 2026-01-05 through 2026-02-11 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Fri 22:25 Seattle-Tacoma (SEA) 06:53 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-01-09 through 2026-02-06 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 22:25 Seattle-Tacoma (SEA) 06:49 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:24 Effective 2026-03-08 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 22:25 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:25 Effective 2026-03-15 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 23:00 Seattle-Tacoma (SEA) 07:29 Boston Logan (BOS) A Korean Air KE 3143 Non-stop Airbus A321neo (32Q) 5:29 Valid until 2026-01-04 Codeshare flight, operated by Delta Air Lines.(DL 473) The flight arrives 1 day after departure.
Daily 07:20 Seattle-Tacoma (SEA) 15:42 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:22 Effective 2026-03-08 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 15:43 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:23 Effective 2026-03-15 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 16:00 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-04-13 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 15:54 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:34 Effective from 2026-10-06 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:30 Seattle-Tacoma (SEA) 15:59 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:29 Effective 2026-02-12 through 2026-03-07 Codeshare flight, operated by Delta Air Lines.(DL 459)
Wed,Thu 07:35 Seattle-Tacoma (SEA) 16:03 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:28 Valid until 2026-01-01 Codeshare flight, operated by Delta Air Lines.(DL 459)
Mon,Tue,Fri-Sun 07:40 Seattle-Tacoma (SEA) 16:08 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:28 Valid until 2026-01-04 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:40 Seattle-Tacoma (SEA) 16:09 Boston Logan (BOS) A Virgin Atlantic VS 3325 Non-stop Airbus A321neo (32Q) 5:29 Effective 2026-01-05 through 2026-02-11 Codeshare flight, operated by Delta Air Lines.(DL 459)
Mon,Tue,Thu-Sun 07:20 Seattle-Tacoma (SEA) 15:42 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:22 Effective 2026-03-08 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 459)
Mon,Tue,Thu-Sun 07:20 Seattle-Tacoma (SEA) 15:43 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:23 Effective 2026-03-15 through 2026-03-31 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 15:43 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:23 Effective 2026-04-01 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 16:00 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-04-13 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 15:54 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:34 Effective 2026-10-06 through 2026-10-24 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 16:00 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:40 Effective from 2026-10-25 Codeshare flight, operated by Delta Air Lines.(DL 459)
Mon,Tue,Thu-Sun 07:30 Seattle-Tacoma (SEA) 15:59 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:29 Effective 2026-02-12 through 2026-03-07 Codeshare flight, operated by Delta Air Lines.(DL 459)
Thu 07:35 Seattle-Tacoma (SEA) 16:03 Boston Logan (BOS) A SAS SK 3351 Non-stop Airbus A321neo (32Q) 5:28 Valid until 2026-01-01 Codeshare flight, operated by Delta Air Lines.(DL 459)
Thu-Sun 08:38 Seattle-Tacoma (SEA) 17:06 Boston Logan (BOS) B Qatar Airways QR 3383 Non-stop Boeing 737 MAX 9 (7M9) 5:28 Valid until 2026-01-03 Codeshare flight, operated by Alaska Airlines.(AS 306)
Tue,Sun 08:38 Seattle-Tacoma (SEA) 17:06 Boston Logan (BOS) B Qatar Airways QR 3383 Non-stop Boeing 737-800 (73H) 5:28 Effective 2026-01-04 through 2026-01-06 Codeshare flight, operated by Alaska Airlines.(AS 306)
Mon 08:38 Seattle-Tacoma (SEA) 17:06 Boston Logan (BOS) B Qatar Airways QR 3383 Non-stop Boeing 737 MAX 8 (7M8) 5:28 Operates only on 2026-01-05 Codeshare flight, operated by Alaska Airlines.(AS 306)
Daily 07:20 Seattle-Tacoma (SEA) 15:42 Boston Logan (BOS) A Air France AF 3534 Non-stop Airbus A321neo (32Q) 5:22 Effective 2026-03-08 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 15:43 Boston Logan (BOS) A Air France AF 3534 Non-stop Airbus A321neo (32Q) 5:23 Effective 2026-03-15 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 459)
Daily 07:20 Seattle-Tacoma (SEA) 16:00 Boston Logan (BOS) A Air France AF 3534 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-04-13 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 459)

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A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Boston Logan airport (BOS).
The flight distance is 2487 miles, or 4003 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 5:14 and 5:53.

Return (BOS-SEA) flights

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All airlines flying from Seattle-Tacoma (SEA) to Boston Logan (BOS).

FLIGHT SCHEDULE

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Effective 2026-02-13 through 2026-02-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 MAX 8 (7M8)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Effective 2026-02-28 through 2026-03-05

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Operates only on 2026-03-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Effective 2026-03-08 through 2026-03-15

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Effective 2026-03-12 through 2026-03-16

Mon

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Operates only on 2026-03-13

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 MAX 8 (7M8)

Direct Codeshare Flights:

Qatar Airways QR2977

08:15

Seattle-Tacoma (SEA)

16:36

Boston Logan (BOS) B

Operates only on 2026-03-17

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:21, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Qatar Airways QR2989

23:25

Seattle-Tacoma (SEA)

07:48(+1)

Boston Logan (BOS) B

Valid until 2026-01-05

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 214)

Duration: 5:23, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Qatar Airways QR2989

23:25

Seattle-Tacoma (SEA)

07:48(+1)

Boston Logan (BOS) B

Valid until 2026-01-03

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 214)

Duration: 5:23, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Qatar Airways QR2989

23:25

Seattle-Tacoma (SEA)

07:48(+1)

Boston Logan (BOS) B

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 214)

Duration: 5:23, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3009

11:50

Seattle-Tacoma (SEA)

20:23

Boston Logan (BOS) A

Effective from 2026-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 438)

Duration: 5:33, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Korean Air KE3009

15:43

Seattle-Tacoma (SEA)

23:58

Boston Logan (BOS) A

Effective 2026-03-08 through 2026-03-13

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:15, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Korean Air KE3009

15:43

Seattle-Tacoma (SEA)

23:59

Boston Logan (BOS) A

Effective 2026-03-15 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:16, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Korean Air KE3009

15:55

Seattle-Tacoma (SEA)

00:23(+1)

Boston Logan (BOS) A

Effective 2026-04-13 through 2026-05-22

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3009

15:55

Seattle-Tacoma (SEA)

00:23(+1)

Boston Logan (BOS) A

Effective 2026-05-25 through 2026-09-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3009

15:55

Seattle-Tacoma (SEA)

00:27(+1)

Boston Logan (BOS) A

Operates only on 2026-09-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:32, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3009

15:55

Seattle-Tacoma (SEA)

00:23(+1)

Boston Logan (BOS) A

Effective 2026-09-07 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3009

15:55

Seattle-Tacoma (SEA)

00:20(+1)

Boston Logan (BOS) A

Effective 2026-10-06 through 2026-10-23

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 474)

Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:00

Seattle-Tacoma (SEA)

06:35(+1)

Boston Logan (BOS) A

Effective 2026-04-13 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:35, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:00

Seattle-Tacoma (SEA)

06:33(+1)

Boston Logan (BOS) A

Effective from 2026-10-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:33, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:20

Seattle-Tacoma (SEA)

06:50(+1)

Boston Logan (BOS) A

Effective 2026-02-12 through 2026-03-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:30, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:20

Seattle-Tacoma (SEA)

07:48(+1)

Boston Logan (BOS) A

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:25

Seattle-Tacoma (SEA)

06:50(+1)

Boston Logan (BOS) A

Effective 2026-01-05 through 2026-02-11

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:25

Seattle-Tacoma (SEA)

06:53(+1)

Boston Logan (BOS) A

Effective 2026-01-09 through 2026-02-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:25

Seattle-Tacoma (SEA)

06:49(+1)

Boston Logan (BOS) A

Effective 2026-03-08 through 2026-03-14

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:24, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

22:25

Seattle-Tacoma (SEA)

06:50(+1)

Boston Logan (BOS) A

Effective 2026-03-15 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Korean Air KE3143

23:00

Seattle-Tacoma (SEA)

07:29(+1)

Boston Logan (BOS) A

Valid until 2026-01-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 473)

Duration: 5:29, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:20

Seattle-Tacoma (SEA)

15:42

Boston Logan (BOS) A

Effective 2026-03-08 through 2026-03-14

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:22, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:20

Seattle-Tacoma (SEA)

15:43

Boston Logan (BOS) A

Effective 2026-03-15 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:23, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:20

Seattle-Tacoma (SEA)

16:00

Boston Logan (BOS) A

Effective 2026-04-13 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:40, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:20

Seattle-Tacoma (SEA)

15:54

Boston Logan (BOS) A

Effective from 2026-10-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:34, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:30

Seattle-Tacoma (SEA)

15:59

Boston Logan (BOS) A

Effective 2026-02-12 through 2026-03-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:29, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:35

Seattle-Tacoma (SEA)

16:03

Boston Logan (BOS) A

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:28, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:40

Seattle-Tacoma (SEA)

16:08

Boston Logan (BOS) A

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:28, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Virgin Atlantic VS3325

07:40

Seattle-Tacoma (SEA)

16:09

Boston Logan (BOS) A

Effective 2026-01-05 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:29, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

15:42

Boston Logan (BOS) A

Effective 2026-03-08 through 2026-03-14

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:22, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

15:43

Boston Logan (BOS) A

Effective 2026-03-15 through 2026-03-31

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:23, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

15:43

Boston Logan (BOS) A

Effective 2026-04-01 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:23, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

16:00

Boston Logan (BOS) A

Effective 2026-04-13 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:40, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

15:54

Boston Logan (BOS) A

Effective 2026-10-06 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:34, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:20

Seattle-Tacoma (SEA)

16:00

Boston Logan (BOS) A

Effective from 2026-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:40, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:30

Seattle-Tacoma (SEA)

15:59

Boston Logan (BOS) A

Effective 2026-02-12 through 2026-03-07

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:29, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

SAS SK3351

07:35

Seattle-Tacoma (SEA)

16:03

Boston Logan (BOS) A

Valid until 2026-01-01

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:28, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Qatar Airways QR3383

08:38

Seattle-Tacoma (SEA)

17:06

Boston Logan (BOS) B

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:28, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Qatar Airways QR3383

08:38

Seattle-Tacoma (SEA)

17:06

Boston Logan (BOS) B

Effective 2026-01-04 through 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:28, non-stop
Boeing 737-800 (73H)

Direct Codeshare Flights:

Qatar Airways QR3383

08:38

Seattle-Tacoma (SEA)

17:06

Boston Logan (BOS) B

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 306)

Duration: 5:28, non-stop
Boeing 737 MAX 8 (7M8)

Direct Codeshare Flights:

Air France AF3534

07:20

Seattle-Tacoma (SEA)

15:42

Boston Logan (BOS) A

Effective 2026-03-08 through 2026-03-14

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:22, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Air France AF3534

07:20

Seattle-Tacoma (SEA)

15:43

Boston Logan (BOS) A

Effective 2026-03-15 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:23, non-stop
Airbus A321neo (32Q)

Direct Codeshare Flights:

Air France AF3534

07:20

Seattle-Tacoma (SEA)

16:00

Boston Logan (BOS) A

Effective 2026-04-13 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 459)

Duration: 5:40, non-stop
Airbus A321neo (32Q)

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A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Boston Logan airport (BOS).
The flight distance is 2487 miles, or 4003 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
For direct flights, the flight time varies between 5:14 and 5:53.

Return (BOS-SEA) flights

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