JAL flight JL 6388: Seattle-Tacoma - Ontario, Los Angeles

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 12:00 Seattle-Tacoma (SEA) 14:47 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:47 Effective 2026-09-01 through 2026-10-24
Codeshare flight, operated by Alaska Airlines.(AS 1367)
Thu-Sun 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737-800 (73H) 2:38 Effective 2026-02-12 through 2026-02-22
Codeshare flight, operated by Alaska Airlines.(AS 664)
Mon-Wed 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective 2026-02-16 through 2026-02-18
Codeshare flight, operated by Alaska Airlines.(AS 664)
Mon,Thu-Sun 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737-800 (73H) 2:38 Effective 2026-02-23 through 2026-03-02
Codeshare flight, operated by Alaska Airlines.(AS 664)
Tue,Wed 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective 2026-02-24 through 2026-02-25
Codeshare flight, operated by Alaska Airlines.(AS 664)
Tue,Thu 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 MAX 9 (7M9) 2:38 Effective 2026-03-03 through 2026-03-05
Codeshare flight, operated by Alaska Airlines.(AS 664)
Tue,Wed,Sat,Sun 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective 2026-03-04 through 2026-03-15
Codeshare flight, operated by Alaska Airlines.(AS 664)
Mon,Thu,Fri 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737-800 (73H) 2:38 Effective 2026-03-06 through 2026-03-16
Codeshare flight, operated by Alaska Airlines.(AS 664)
Tue 12:30 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 MAX 9 (7M9) 2:38 Operates only on 2026-03-17
Codeshare flight, operated by Alaska Airlines.(AS 664)
Daily 12:31 Seattle-Tacoma (SEA) 15:08 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737-800 (73H) 2:37 Effective 2026-01-07 through 2026-02-11
Codeshare flight, operated by Alaska Airlines.(AS 664)
Mon-Wed,Fri,Sun 13:02 Seattle-Tacoma (SEA) 15:42 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:40 Valid until 2026-01-06
Codeshare flight, operated by Alaska Airlines.(AS 664)
Thu 13:02 Seattle-Tacoma (SEA) 15:42 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 MAX 9 (7M9) 2:40 Operates only on 2026-01-01
Codeshare flight, operated by Alaska Airlines.(AS 664)
Sat 13:02 Seattle-Tacoma (SEA) 15:42 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737-800 (73H) 2:40 Operates only on 2026-01-03
Codeshare flight, operated by Alaska Airlines.(AS 664)
Daily 13:18 Seattle-Tacoma (SEA) 15:50 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:32 Effective 2026-05-13 through 2026-06-09
Codeshare flight, operated by Alaska Airlines.(AS 679)
Daily 15:25 Seattle-Tacoma (SEA) 18:03 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective 2026-06-10 through 2026-08-18
Codeshare flight, operated by Alaska Airlines.(AS 529)
Daily 15:35 Seattle-Tacoma (SEA) 18:13 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective 2026-08-19 through 2026-08-31
Codeshare flight, operated by Alaska Airlines.(AS 529)
Daily 15:35 Seattle-Tacoma (SEA) 18:13 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:38 Effective from 2026-10-25
Codeshare flight, operated by Alaska Airlines.(AS 529)
Wed 15:45 Seattle-Tacoma (SEA) 18:17 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:32 Operates only on 2026-03-18
Codeshare flight, operated by Alaska Airlines.(AS 592)
Daily 15:45 Seattle-Tacoma (SEA) 18:19 Ontario, Los Angeles (ONT) 2
JL 6388 Non-stop Boeing 737 (73J) 2:34 Effective 2026-03-19 through 2026-05-12
Codeshare flight, operated by Alaska Airlines.(AS 592)


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JAL flight JL 6388:
Seattle-Tacoma - Ontario, Los Angeles
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
JAL JL6388
12:00
Seattle-Tacoma (SEA)

14:47
Ontario, Los Angeles (ONT) 2
Effective 2026-09-01 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 1367)
Duration: 2:47, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-02-12 through 2026-02-22
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737-800 (73H)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-02-16 through 2026-02-18
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-02-23 through 2026-03-02
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737-800 (73H)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-02-24 through 2026-02-25
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-03-03 through 2026-03-05
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737 MAX 9 (7M9)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-03-04 through 2026-03-15
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-03-06 through 2026-03-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737-800 (73H)
Direct Codeshare Flights:
JAL JL6388
12:30
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Operates only on 2026-03-17
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:38, non-stop
Boeing 737 MAX 9 (7M9)
Direct Codeshare Flights:
JAL JL6388
12:31
Seattle-Tacoma (SEA)

15:08
Ontario, Los Angeles (ONT) 2
Effective 2026-01-07 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:37, non-stop
Boeing 737-800 (73H)
Direct Codeshare Flights:
JAL JL6388
13:02
Seattle-Tacoma (SEA)

15:42
Ontario, Los Angeles (ONT) 2
Valid until 2026-01-06
Mon
Tue
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:40, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
13:02
Seattle-Tacoma (SEA)

15:42
Ontario, Los Angeles (ONT) 2
Operates only on 2026-01-01
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:40, non-stop
Boeing 737 MAX 9 (7M9)
Direct Codeshare Flights:
JAL JL6388
13:02
Seattle-Tacoma (SEA)

15:42
Ontario, Los Angeles (ONT) 2
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 664)
Duration: 2:40, non-stop
Boeing 737-800 (73H)
Direct Codeshare Flights:
JAL JL6388
13:18
Seattle-Tacoma (SEA)

15:50
Ontario, Los Angeles (ONT) 2
Effective 2026-05-13 through 2026-06-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 679)
Duration: 2:32, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
15:25
Seattle-Tacoma (SEA)

18:03
Ontario, Los Angeles (ONT) 2
Effective 2026-06-10 through 2026-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 529)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
15:35
Seattle-Tacoma (SEA)

18:13
Ontario, Los Angeles (ONT) 2
Effective 2026-08-19 through 2026-08-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 529)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
15:35
Seattle-Tacoma (SEA)

18:13
Ontario, Los Angeles (ONT) 2
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 529)
Duration: 2:38, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
15:45
Seattle-Tacoma (SEA)

18:17
Ontario, Los Angeles (ONT) 2
Operates only on 2026-03-18
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 592)
Duration: 2:32, non-stop
Boeing 737 (73J)
Direct Codeshare Flights:
JAL JL6388
15:45
Seattle-Tacoma (SEA)

18:19
Ontario, Los Angeles (ONT) 2
Effective 2026-03-19 through 2026-05-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Alaska Airlines. (AS 592)
Duration: 2:34, non-stop
Boeing 737 (73J)
  • JL 6388 is a domestic flight departing from the Seattle-Tacoma airport (SEA) and arriving at Ontario, Los Angeles airport (ONT).
  • The flight distance is 956 miles, or 1539 km.
  • The timezone of both the departure and the arrival airports is UTC-8 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 2:32 and 2:47.
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