Alaska Airlines flights from Seattle-Tacoma (SEA) to Philadelphia (PHL).

FLIGHT SCHEDULE
Direct Flights:
Daily 21:15 Seattle-Tacoma (SEA) 05:23 Philadelphia (PHL) D Alaska Airlines AS 371 Non-stop Boeing 737 (73J) 5:08 Effective 2026-03-19 through 2026-05-12 The flight arrives 1 day after departure.
Mon-Sat 21:29 Seattle-Tacoma (SEA) 05:37 Philadelphia (PHL) D Alaska Airlines AS 371 Non-stop Boeing 737 MAX 9 (7M9) 5:08 Valid until 2026-01-05 The flight arrives 1 day after departure.
Sun 21:29 Seattle-Tacoma (SEA) 05:37 Philadelphia (PHL) D Alaska Airlines AS 371 Non-stop Boeing 737 (73J) 5:08 Operates only on 2026-01-04 The flight arrives 1 day after departure.
Wed 09:15 Seattle-Tacoma (SEA) 17:31 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:16 Operates only on 2026-03-18
Daily 09:15 Seattle-Tacoma (SEA) 17:28 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:13 Effective 2026-03-19 through 2026-05-12
Daily 09:16 Seattle-Tacoma (SEA) 17:20 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:04 Effective 2026-02-12 through 2026-03-07
Mon-Thu,Sun 09:18 Seattle-Tacoma (SEA) 17:22 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:04 Effective 2026-03-08 through 2026-03-12
Fri-Sun 09:18 Seattle-Tacoma (SEA) 17:22 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:04 Effective 2026-03-13 through 2026-03-15
Mon,Tue 09:18 Seattle-Tacoma (SEA) 17:22 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:04 Effective 2026-03-16 through 2026-03-17
Mon,Thu,Fri,Sun 09:34 Seattle-Tacoma (SEA) 17:44 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:10 Valid until 2026-01-05
Tue,Wed,Sat 09:34 Seattle-Tacoma (SEA) 17:44 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:10 Valid until 2026-01-06
Daily 09:40 Seattle-Tacoma (SEA) 17:54 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:14 Effective 2026-05-13 through 2026-06-09
Daily 09:42 Seattle-Tacoma (SEA) 17:52 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:10 Effective from 2026-06-10
Tue,Wed,Sat 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:09 Effective 2026-01-07 through 2026-01-20
Mon,Thu,Fri,Sun 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:09 Effective 2026-01-08 through 2026-01-19
Wed,Fri,Sun 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:09 Effective 2026-01-21 through 2026-01-25
Mon-Thu,Sat 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:09 Effective 2026-01-22 through 2026-01-28
Mon,Thu,Fri 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:09 Effective 2026-01-29 through 2026-02-06
Tue,Sat,Sun 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:09 Effective 2026-01-31 through 2026-02-07
Wed 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737-800 (73H) 5:09 Operates only on 2026-02-04
Sun 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 (73J) 5:09 Operates only on 2026-02-08
Mon-Wed 09:54 Seattle-Tacoma (SEA) 18:03 Philadelphia (PHL) D Alaska Airlines AS 442 Non-stop Boeing 737 MAX 9 (7M9) 5:09 Effective 2026-02-09 through 2026-02-11
Daily 21:15 Seattle-Tacoma (SEA) 05:27 Philadelphia (PHL) D Alaska Airlines AS 444 Non-stop Boeing 737 (73J) 5:12 Effective from 2026-06-10 The flight arrives 1 day after departure.
Daily 21:25 Seattle-Tacoma (SEA) 05:40 Philadelphia (PHL) D Alaska Airlines AS 444 Non-stop Boeing 737 (73J) 5:15 Effective 2026-05-13 through 2026-06-09 The flight arrives 1 day after departure.

A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Philadelphia airport (PHL).
The flight distance is 2371 miles, or 3815 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 5:04 and 5:16.

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FLIGHT SCHEDULE

Direct Flights:

Alaska Airlines AS371

21:15

Seattle-Tacoma (SEA)

05:23(+1)

Philadelphia (PHL) D

Effective 2026-03-19 through 2026-05-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:08, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.

Direct Flights:

Alaska Airlines AS371

21:29

Seattle-Tacoma (SEA)

05:37(+1)

Philadelphia (PHL) D

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 5:08, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Direct Flights:

Alaska Airlines AS371

21:29

Seattle-Tacoma (SEA)

05:37(+1)

Philadelphia (PHL) D

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:08, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.

Direct Flights:

Alaska Airlines AS442

09:15

Seattle-Tacoma (SEA)

17:31

Philadelphia (PHL) D

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:16, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:15

Seattle-Tacoma (SEA)

17:28

Philadelphia (PHL) D

Effective 2026-03-19 through 2026-05-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:13, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:16

Seattle-Tacoma (SEA)

17:20

Philadelphia (PHL) D

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:04, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:18

Seattle-Tacoma (SEA)

17:22

Philadelphia (PHL) D

Effective 2026-03-08 through 2026-03-12

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun

Duration: 5:04, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:18

Seattle-Tacoma (SEA)

17:22

Philadelphia (PHL) D

Effective 2026-03-13 through 2026-03-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun

Duration: 5:04, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:18

Seattle-Tacoma (SEA)

17:22

Philadelphia (PHL) D

Effective 2026-03-16 through 2026-03-17

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:04, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:34

Seattle-Tacoma (SEA)

17:44

Philadelphia (PHL) D

Valid until 2026-01-05

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 5:10, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:34

Seattle-Tacoma (SEA)

17:44

Philadelphia (PHL) D

Valid until 2026-01-06

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:10, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:40

Seattle-Tacoma (SEA)

17:54

Philadelphia (PHL) D

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:14, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:42

Seattle-Tacoma (SEA)

17:52

Philadelphia (PHL) D

Effective from 2026-06-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:10, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-07 through 2026-01-20

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat

Sun
-

Duration: 5:09, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-08 through 2026-01-19

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 5:09, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-21 through 2026-01-25

Mon
-

Tue
-

Wed

Thu
-

Fri

Sat
-

Sun

Duration: 5:09, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-22 through 2026-01-28

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun
-

Duration: 5:09, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-29 through 2026-02-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:09, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-01-31 through 2026-02-07

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun

Duration: 5:09, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Operates only on 2026-02-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:09, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Operates only on 2026-02-08

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:09, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS442

09:54

Seattle-Tacoma (SEA)

18:03

Philadelphia (PHL) D

Effective 2026-02-09 through 2026-02-11

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:09, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS444

21:15

Seattle-Tacoma (SEA)

05:27(+1)

Philadelphia (PHL) D

Effective from 2026-06-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:12, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.

Direct Flights:

Alaska Airlines AS444

21:25

Seattle-Tacoma (SEA)

05:40(+1)

Philadelphia (PHL) D

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:15, non-stop
Boeing 737 (73J)
The flight arrives 1 day after departure.

A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Philadelphia airport (PHL).
The flight distance is 2371 miles, or 3815 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 5:04 and 5:16.

All SEA-PHL flights

All Alaska Airlines flights

Return (PHL-SEA) flights

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