Southwest Airlines flights from Phoenix Sky Harbor (PHX) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE
Direct Flights:
Mon 07:55 Phoenix Sky Harbor (PHX) 4 10:10 Seattle-Tacoma (SEA) Southwest Airlines WN 105 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-01-05
Mon,Tue,Fri,Sun 08:40 Phoenix Sky Harbor (PHX) 4 10:55 Seattle-Tacoma (SEA) Southwest Airlines WN 105 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Valid until 2026-01-04
Sat 09:05 Phoenix Sky Harbor (PHX) 4 11:20 Seattle-Tacoma (SEA) Southwest Airlines WN 105 Non-stop Boeing 737-800 (73H) 3:15 Valid until 2026-01-03
Wed,Thu 20:45 Phoenix Sky Harbor (PHX) 4 22:55 Seattle-Tacoma (SEA) Southwest Airlines WN 105 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Valid until 2026-01-01
Sat 21:40 Phoenix Sky Harbor (PHX) 4 00:35 Seattle-Tacoma (SEA) Southwest Airlines WN 286 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-06 through 2026-08-01 The flight arrives 1 day after departure.
Sat 18:35 Phoenix Sky Harbor (PHX) 4 21:40 Seattle-Tacoma (SEA) Southwest Airlines WN 510 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-03-14 through 2026-04-04
Sat 19:35 Phoenix Sky Harbor (PHX) 4 21:40 Seattle-Tacoma (SEA) Southwest Airlines WN 510 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Operates only on 2026-03-07
Mon,Thu,Fri 10:45 Phoenix Sky Harbor (PHX) 4 13:50 Seattle-Tacoma (SEA) Southwest Airlines WN 814 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-06-04 through 2026-08-03
Sat 08:55 Phoenix Sky Harbor (PHX) 4 12:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1129 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-04-11 through 2026-05-30
Sun 10:05 Phoenix Sky Harbor (PHX) 4 13:15 Seattle-Tacoma (SEA) Southwest Airlines WN 1129 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Operates only on 2026-05-24
Tue,Wed 10:25 Phoenix Sky Harbor (PHX) 4 13:35 Seattle-Tacoma (SEA) Southwest Airlines WN 1129 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-04-07 through 2026-06-03
Sun 10:35 Phoenix Sky Harbor (PHX) 4 13:40 Seattle-Tacoma (SEA) Southwest Airlines WN 1129 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-04-12 through 2026-05-17
Sun 10:35 Phoenix Sky Harbor (PHX) 4 13:40 Seattle-Tacoma (SEA) Southwest Airlines WN 1129 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-05-31
Wed,Thu 09:45 Phoenix Sky Harbor (PHX) 4 12:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1305 Non-stop Boeing 737 MAX 8 (7M8) 3:20 Valid until 2026-01-01
Mon 15:55 Phoenix Sky Harbor (PHX) 4 18:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1305 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2026-01-05
Sat 17:25 Phoenix Sky Harbor (PHX) 4 19:35 Seattle-Tacoma (SEA) Southwest Airlines WN 1394 Non-stop Boeing 737-800 (73H) 3:10 Valid until 2026-01-03
Tue,Wed 21:45 Phoenix Sky Harbor (PHX) 4 00:40 Seattle-Tacoma (SEA) Southwest Airlines WN 1418 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-09 through 2026-07-29 The flight arrives 1 day after departure.
Mon,Thu,Fri 17:00 Phoenix Sky Harbor (PHX) 4 20:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1474 Non-stop Boeing 737-800 (73H) 3:05 Effective 2026-04-09 through 2026-06-01
Tue,Wed 16:20 Phoenix Sky Harbor (PHX) 4 19:30 Seattle-Tacoma (SEA) Southwest Airlines WN 1571 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-03-10 through 2026-04-01
Sun 17:55 Phoenix Sky Harbor (PHX) 4 21:00 Seattle-Tacoma (SEA) Southwest Airlines WN 1571 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 18:05 Phoenix Sky Harbor (PHX) 4 21:15 Seattle-Tacoma (SEA) Southwest Airlines WN 1571 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-03-09 through 2026-04-06
Thu,Fri 19:05 Phoenix Sky Harbor (PHX) 4 21:15 Seattle-Tacoma (SEA) Southwest Airlines WN 1571 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-03-05 through 2026-03-06
Sat 19:00 Phoenix Sky Harbor (PHX) 4 22:00 Seattle-Tacoma (SEA) Southwest Airlines WN 2118 Non-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-04-11 through 2026-05-30
Tue,Wed 20:35 Phoenix Sky Harbor (PHX) 4 23:35 Seattle-Tacoma (SEA) Southwest Airlines WN 2118 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri 21:55 Phoenix Sky Harbor (PHX) 4 00:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2118 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-04-09 through 2026-06-01 The flight arrives 1 day after departure.
Sat 10:45 Phoenix Sky Harbor (PHX) 4 13:50 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-14 through 2026-04-04
Tue,Wed 11:15 Phoenix Sky Harbor (PHX) 4 14:20 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-10 through 2026-04-01
Sun 11:35 Phoenix Sky Harbor (PHX) 4 14:40 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737-800 (73H) 3:05 Effective 2026-03-08 through 2026-04-05
Sat 11:45 Phoenix Sky Harbor (PHX) 4 13:50 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-03-07
Mon,Thu,Fri 12:00 Phoenix Sky Harbor (PHX) 4 15:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-09 through 2026-04-06
Thu,Fri 13:00 Phoenix Sky Harbor (PHX) 4 15:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2236 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-03-05 through 2026-03-06
Sun 20:50 Phoenix Sky Harbor (PHX) 4 23:50 Seattle-Tacoma (SEA) Southwest Airlines WN 2256 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2026-05-24
Sun 22:55 Phoenix Sky Harbor (PHX) 4 01:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2256 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-04-12 through 2026-05-17 The flight arrives 1 day after departure.
Sun 22:55 Phoenix Sky Harbor (PHX) 4 01:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2256 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2026-05-31 The flight arrives 1 day after departure.
Sat 19:00 Phoenix Sky Harbor (PHX) 4 21:10 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-01-10 through 2026-02-07
Sat 20:40 Phoenix Sky Harbor (PHX) 4 22:50 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-02-14 through 2026-02-28
Mon-Fri 20:55 Phoenix Sky Harbor (PHX) 4 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 20:55 Phoenix Sky Harbor (PHX) 4 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-01-18 through 2026-01-23
Mon-Fri 20:55 Phoenix Sky Harbor (PHX) 4 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 20:55 Phoenix Sky Harbor (PHX) 4 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-02-08 through 2026-02-11
Tue,Wed 20:55 Phoenix Sky Harbor (PHX) 4 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-02-18 through 2026-03-04
Thu,Fri,Sun 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-01-11 through 2026-01-16
Mon,Sun 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-02-01 through 2026-02-06
Mon,Sun 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-02-17 through 2026-02-23
Mon 21:05 Phoenix Sky Harbor (PHX) 4 23:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2026-03-02
Mon,Thu,Fri 22:50 Phoenix Sky Harbor (PHX) 4 00:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-12 through 2026-02-16 The flight arrives 1 day after departure.
Thu,Fri,Sun 22:50 Phoenix Sky Harbor (PHX) 4 00:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2305 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-20 through 2026-03-01 The flight arrives 1 day after departure.
Mon 21:50 Phoenix Sky Harbor (PHX) 4 00:05 Seattle-Tacoma (SEA) Southwest Airlines WN 2307 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-01-05 The flight arrives 1 day after departure.

1 2 3

A domestic route departing from the Phoenix Sky Harbor airport (PHX) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 1106 miles, or 1781 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-8 . 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 2:55 and 3:20.

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Southwest Airlines flights from Phoenix Sky Harbor (PHX) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN105

07:55

Phoenix Sky Harbor (PHX) 4

10:10

Seattle-Tacoma (SEA)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN105

08:40

Phoenix Sky Harbor (PHX) 4

10:55

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN105

09:05

Phoenix Sky Harbor (PHX) 4

11:20

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:15, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN105

20:45

Phoenix Sky Harbor (PHX) 4

22:55

Seattle-Tacoma (SEA)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN286

21:40

Phoenix Sky Harbor (PHX) 4

00:35(+1)

Seattle-Tacoma (SEA)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:55, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN510

18:35

Phoenix Sky Harbor (PHX) 4

21:40

Seattle-Tacoma (SEA)

Effective 2026-03-14 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN510

19:35

Phoenix Sky Harbor (PHX) 4

21:40

Seattle-Tacoma (SEA)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN814

10:45

Phoenix Sky Harbor (PHX) 4

13:50

Seattle-Tacoma (SEA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1129

08:55

Phoenix Sky Harbor (PHX) 4

12:05

Seattle-Tacoma (SEA)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1129

10:05

Phoenix Sky Harbor (PHX) 4

13:15

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1129

10:25

Phoenix Sky Harbor (PHX) 4

13:35

Seattle-Tacoma (SEA)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1129

10:35

Phoenix Sky Harbor (PHX) 4

13:40

Seattle-Tacoma (SEA)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1129

10:35

Phoenix Sky Harbor (PHX) 4

13:40

Seattle-Tacoma (SEA)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1305

09:45

Phoenix Sky Harbor (PHX) 4

12:05

Seattle-Tacoma (SEA)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:20, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1305

15:55

Phoenix Sky Harbor (PHX) 4

18:05

Seattle-Tacoma (SEA)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1394

17:25

Phoenix Sky Harbor (PHX) 4

19:35

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1418

21:45

Phoenix Sky Harbor (PHX) 4

00:40(+1)

Seattle-Tacoma (SEA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN1474

17:00

Phoenix Sky Harbor (PHX) 4

20:05

Seattle-Tacoma (SEA)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1571

16:20

Phoenix Sky Harbor (PHX) 4

19:30

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1571

17:55

Phoenix Sky Harbor (PHX) 4

21:00

Seattle-Tacoma (SEA)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1571

18:05

Phoenix Sky Harbor (PHX) 4

21:15

Seattle-Tacoma (SEA)

Effective 2026-03-09 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1571

19:05

Phoenix Sky Harbor (PHX) 4

21:15

Seattle-Tacoma (SEA)

Effective 2026-03-05 through 2026-03-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2118

19:00

Phoenix Sky Harbor (PHX) 4

22:00

Seattle-Tacoma (SEA)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2118

20:35

Phoenix Sky Harbor (PHX) 4

23:35

Seattle-Tacoma (SEA)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2118

21:55

Phoenix Sky Harbor (PHX) 4

00:55(+1)

Seattle-Tacoma (SEA)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2236

10:45

Phoenix Sky Harbor (PHX) 4

13:50

Seattle-Tacoma (SEA)

Effective 2026-03-14 through 2026-04-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2236

11:15

Phoenix Sky Harbor (PHX) 4

14:20

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2236

11:35

Phoenix Sky Harbor (PHX) 4

14:40

Seattle-Tacoma (SEA)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2236

11:45

Phoenix Sky Harbor (PHX) 4

13:50

Seattle-Tacoma (SEA)

Operates only on 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2236

12:00

Phoenix Sky Harbor (PHX) 4

15:05

Seattle-Tacoma (SEA)

Effective 2026-03-09 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2236

13:00

Phoenix Sky Harbor (PHX) 4

15:05

Seattle-Tacoma (SEA)

Effective 2026-03-05 through 2026-03-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2256

20:50

Phoenix Sky Harbor (PHX) 4

23:50

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2256

22:55

Phoenix Sky Harbor (PHX) 4

01:55(+1)

Seattle-Tacoma (SEA)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2256

22:55

Phoenix Sky Harbor (PHX) 4

01:55(+1)

Seattle-Tacoma (SEA)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2305

19:00

Phoenix Sky Harbor (PHX) 4

21:10

Seattle-Tacoma (SEA)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

20:40

Phoenix Sky Harbor (PHX) 4

22:50

Seattle-Tacoma (SEA)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2305

20:55

Phoenix Sky Harbor (PHX) 4

23:05

Seattle-Tacoma (SEA)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

20:55

Phoenix Sky Harbor (PHX) 4

23:05

Seattle-Tacoma (SEA)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

20:55

Phoenix Sky Harbor (PHX) 4

23:05

Seattle-Tacoma (SEA)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

20:55

Phoenix Sky Harbor (PHX) 4

23:05

Seattle-Tacoma (SEA)

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

20:55

Phoenix Sky Harbor (PHX) 4

23:05

Seattle-Tacoma (SEA)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

21:05

Phoenix Sky Harbor (PHX) 4

23:15

Seattle-Tacoma (SEA)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2305

22:50

Phoenix Sky Harbor (PHX) 4

00:55(+1)

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2305

22:50

Phoenix Sky Harbor (PHX) 4

00:55(+1)

Seattle-Tacoma (SEA)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2307

21:50

Phoenix Sky Harbor (PHX) 4

00:05(+1)

Seattle-Tacoma (SEA)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

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A domestic route departing from the Phoenix Sky Harbor airport (PHX) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 1106 miles, or 1781 km.
The timezone of the departure airport is UTC-7 , and the timezone of the arrival airport is UTC-8 . 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 2:55 and 3:20.

All PHX-SEA flights

All Southwest Airlines flights

Return (SEA-PHX) flights

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