Delta Air Lines flights from Seattle-Tacoma (SEA) to Boston Logan (BOS).

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 11:50 Seattle-Tacoma (SEA) 20:30 Boston Logan (BOS) A
Delta Air Lines DL 412 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-05-07 through 2026-06-06
Daily 11:50 Seattle-Tacoma (SEA) 20:30 Boston Logan (BOS) A
Delta Air Lines DL 438 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-06-07 through 2026-10-05
Daily 11:50 Seattle-Tacoma (SEA) 20:23 Boston Logan (BOS) A
Delta Air Lines DL 438 Non-stop Airbus A321neo (32Q) 5:33 Effective from 2026-10-06
Daily 07:20 Seattle-Tacoma (SEA) 15:42 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:22 Effective 2026-03-08 through 2026-03-14
Daily 07:20 Seattle-Tacoma (SEA) 15:43 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:23 Effective 2026-03-15 through 2026-04-12
Daily 07:20 Seattle-Tacoma (SEA) 16:00 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:40 Effective 2026-04-13 through 2026-10-05
Daily 07:20 Seattle-Tacoma (SEA) 15:54 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:34 Effective from 2026-10-06
Daily 07:30 Seattle-Tacoma (SEA) 15:59 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:29 Effective 2026-02-12 through 2026-03-07
Wed,Thu 07:35 Seattle-Tacoma (SEA) 16:03 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:28 Valid until 2026-01-01
Mon,Tue,Fri-Sun 07:40 Seattle-Tacoma (SEA) 16:08 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:28 Valid until 2026-01-04
Daily 07:40 Seattle-Tacoma (SEA) 16:09 Boston Logan (BOS) A
Delta Air Lines DL 459 Non-stop Airbus A321neo (32Q) 5:29 Effective 2026-01-05 through 2026-02-11
Daily 22:00 Seattle-Tacoma (SEA) 06:35 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:35 Effective 2026-04-13 through 2026-10-05
The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 06:33 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:33 Effective from 2026-10-06
The flight arrives 1 day after departure.
Daily 22:20 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:30 Effective 2026-02-12 through 2026-03-06
The flight arrives 1 day after departure.
Sat 22:20 Seattle-Tacoma (SEA) 07:48 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:28 Operates only on 2026-03-07
The flight arrives 1 day after departure.
Mon-Thu,Sat,Sun 22:25 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:25 Effective 2026-01-05 through 2026-02-11
The flight arrives 1 day after departure.
Fri 22:25 Seattle-Tacoma (SEA) 06:53 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-01-09 through 2026-02-06
The flight arrives 1 day after departure.
Daily 22:25 Seattle-Tacoma (SEA) 06:49 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:24 Effective 2026-03-08 through 2026-03-14
The flight arrives 1 day after departure.
Daily 22:25 Seattle-Tacoma (SEA) 06:50 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:25 Effective 2026-03-15 through 2026-04-12
The flight arrives 1 day after departure.
Daily 23:00 Seattle-Tacoma (SEA) 07:29 Boston Logan (BOS) A
Delta Air Lines DL 473 Non-stop Airbus A321neo (32Q) 5:29 Valid until 2026-01-04
The flight arrives 1 day after departure.
Mon-Fri,Sun 15:43 Seattle-Tacoma (SEA) 23:58 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:15 Effective 2026-03-08 through 2026-03-13
Mon-Fri,Sun 15:43 Seattle-Tacoma (SEA) 23:59 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:16 Effective 2026-03-15 through 2026-04-12
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-04-13 through 2026-05-22
The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-05-25 through 2026-09-04
The flight arrives 1 day after departure.
Sun 15:55 Seattle-Tacoma (SEA) 00:27 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:32 Operates only on 2026-09-06
The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:23 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:28 Effective 2026-09-07 through 2026-10-05
The flight arrives 1 day after departure.
Mon-Fri,Sun 15:55 Seattle-Tacoma (SEA) 00:20 Boston Logan (BOS) A
Delta Air Lines DL 474 Non-stop Airbus A321neo (32Q) 5:25 Effective from 2026-10-06
The flight arrives 1 day after departure.




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Delta Air Lines flights from Seattle-Tacoma (SEA) to Boston Logan (BOS).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL412
11:50
Seattle-Tacoma (SEA)

20:30
Boston Logan (BOS) A
Effective 2026-05-07 through 2026-06-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:40, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL438
11:50
Seattle-Tacoma (SEA)

20:30
Boston Logan (BOS) A
Effective 2026-06-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:40, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL438
11:50
Seattle-Tacoma (SEA)

20:23
Boston Logan (BOS) A
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:33, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
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
Duration: 5:22, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
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
Duration: 5:23, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
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
Duration: 5:40, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
07:20
Seattle-Tacoma (SEA)

15:54
Boston Logan (BOS) A
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:34, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
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
Duration: 5:29, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
07:35
Seattle-Tacoma (SEA)

16:03
Boston Logan (BOS) A
Valid until 2026-01-01
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 5:28, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
07:40
Seattle-Tacoma (SEA)

16:08
Boston Logan (BOS) A
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 5:28, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL459
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
Duration: 5:29, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL473
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
Duration: 5:35, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
22:00
Seattle-Tacoma (SEA)

06:33(+1)
Boston Logan (BOS) A
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:33, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
Duration: 5:30, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
-
Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
-
Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
Duration: 5:24, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
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
Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL473
23:00
Seattle-Tacoma (SEA)

07:29(+1)
Boston Logan (BOS) A
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:29, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:15, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:16, non-stop
Airbus A321neo (32Q)
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:32, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL474
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
Duration: 5:28, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL474
15:55
Seattle-Tacoma (SEA)

00:20(+1)
Boston Logan (BOS) A
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:25, non-stop
Airbus A321neo (32Q)
The flight arrives 1 day after departure.
  • 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 5:15 and 5:40.
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