All airlines flying from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).
| FLIGHT SCHEDULE |
|---|
| Direct Flights: |
| Daily
18:58
Ontario, Los Angeles (ONT) 2
21:39
Seattle-Tacoma (SEA) Alaska Airlines AS 530 Non-stop Boeing 737 (73J) 2:41 Effective from 2026-06-10 |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:44
Seattle-Tacoma (SEA) Alaska Airlines AS 532 Non-stop Boeing 737 (73J) 2:44 Effective from 2026-06-10 |
| Wed
18:55
Ontario, Los Angeles (ONT) 2
21:44
Seattle-Tacoma (SEA) Alaska Airlines AS 594 Non-stop Boeing 737 (73J) 2:49 Operates only on 2026-03-18 |
| Daily
18:55
Ontario, Los Angeles (ONT) 2
21:41
Seattle-Tacoma (SEA) Alaska Airlines AS 594 Non-stop Boeing 737 (73J) 2:46 Effective 2026-03-19 through 2026-05-12 |
| Mon,Tue
19:19
Ontario, Los Angeles (ONT) 2
22:10
Seattle-Tacoma (SEA) Alaska Airlines AS 594 Non-stop Boeing 737 (73J) 2:51 Valid until 2026-01-05 |
| Fri,Sun
19:19
Ontario, Los Angeles (ONT) 2
22:10
Seattle-Tacoma (SEA) Alaska Airlines AS 594 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Effective 2026-01-02 through 2026-01-04 |
| Tue
19:19
Ontario, Los Angeles (ONT) 2
22:10
Seattle-Tacoma (SEA) Alaska Airlines AS 594 Non-stop Boeing 737-800 (73H) 2:51 Operates only on 2026-01-06 |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:42
Seattle-Tacoma (SEA) Alaska Airlines AS 599 Non-stop Boeing 737 (73J) 2:42 Effective 2026-05-13 through 2026-06-09 |
| Tue,Fri
06:00
Ontario, Los Angeles (ONT) 2
08:57
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:57 Valid until 2026-01-02 |
| Tue-Thu,Sat,Sun
06:00
Ontario, Los Angeles (ONT) 2
08:57
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:57 Valid until 2026-01-06 |
| Mon
06:00
Ontario, Los Angeles (ONT) 2
08:57
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737-800 (73H) 2:57 Operates only on 2026-01-05 |
| Thu,Sun
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:54 Effective 2026-01-08 through 2026-01-15 |
| Mon,Fri
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:54 Effective 2026-01-09 through 2026-01-12 |
| Mon,Fri,Sun
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:54 Effective 2026-01-16 through 2026-01-25 |
| Mon,Thu
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:54 Effective 2026-01-22 through 2026-01-26 |
| Thu
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:54 Effective 2026-01-29 through 2026-02-05 |
| Mon,Fri,Sun
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:54 Effective 2026-01-30 through 2026-02-02 |
| Mon,Fri,Sun
06:00
Ontario, Los Angeles (ONT) 2
08:54
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:54 Effective 2026-02-06 through 2026-02-09 |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:50
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:50 Effective 2026-03-18 through 2026-05-12 |
| Mon-Thu,Sat
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:55 Effective 2026-02-12 through 2026-02-18 |
| Thu,Fri,Sun
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:55 Effective 2026-02-13 through 2026-02-26 |
| Mon-Wed,Fri,Sat
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:55 Effective 2026-02-21 through 2026-03-07 |
| Thu,Sun
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:55 Effective 2026-03-01 through 2026-03-05 |
| Mon-Wed,Fri-Sun
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 MAX 9 (7M9) 2:55 Effective 2026-03-08 through 2026-03-16 |
| Tue,Thu
06:14
Ontario, Los Angeles (ONT) 2
09:09
Seattle-Tacoma (SEA) Alaska Airlines AS 607 Non-stop Boeing 737 (73J) 2:55 Effective 2026-03-12 through 2026-03-17 |
| Daily
16:45
Ontario, Los Angeles (ONT) 2
19:25
Seattle-Tacoma (SEA) Alaska Airlines AS 625 Non-stop Boeing 737 (73J) 2:40 Effective 2026-05-13 through 2026-06-09 |
| Mon-Thu,Sun
10:44
Ontario, Los Angeles (ONT) 2
13:35
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:51 Valid until 2026-01-04 |
| Mon,Fri
10:44
Ontario, Los Angeles (ONT) 2
13:35
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Effective 2026-01-02 through 2026-01-05 |
| Tue
10:44
Ontario, Los Angeles (ONT) 2
13:35
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:51 Operates only on 2026-01-06 |
| Sat
11:00
Ontario, Los Angeles (ONT) 2
13:51
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Operates only on 2026-01-03 |
| Wed
11:30
Ontario, Los Angeles (ONT) 2
14:20
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:50 Operates only on 2026-03-18 |
| Daily
11:30
Ontario, Los Angeles (ONT) 2
14:19
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:49 Effective 2026-03-19 through 2026-05-12 |
| Tue,Wed,Fri,Sat
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:51 Effective 2026-01-07 through 2026-01-14 |
| Mon,Thu,Sun
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Effective 2026-01-08 through 2026-01-12 |
| Tue-Sat
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:51 Effective 2026-01-15 through 2026-02-07 |
| Mon,Sun
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Effective 2026-01-18 through 2026-02-08 |
| Mon
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:51 Operates only on 2026-02-09 |
| Tue
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737-800 (73H) 2:51 Operates only on 2026-02-10 |
| Wed
11:53
Ontario, Los Angeles (ONT) 2
14:44
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Operates only on 2026-02-11 |
| Mon,Wed,Thu
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:50 Effective 2026-02-12 through 2026-02-18 |
| Thu-Sun
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-02-13 through 2026-02-22 |
| Tue
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Operates only on 2026-02-17 |
| Mon,Wed
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:50 Effective 2026-02-23 through 2026-03-04 |
| Tue,Thu-Sun
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-02-24 through 2026-03-05 |
| Wed,Fri
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Effective 2026-03-06 through 2026-03-11 |
| Mon,Sat
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Effective 2026-03-07 through 2026-03-09 |
| Sun
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737 (73J) 2:50 Effective 2026-03-08 through 2026-03-15 |
| Mon,Tue,Thu-Sat
12:02
Ontario, Los Angeles (ONT) 2
14:52
Seattle-Tacoma (SEA) Alaska Airlines AS 654 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-03-10 through 2026-03-17 |
| Thu-Sun
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-02-12 through 2026-02-22 |
| Mon-Wed
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 (73J) 2:50 Effective 2026-02-16 through 2026-02-18 |
- A domestic route departing from the Ontario, Los Angeles airport (ONT) and arriving at Seattle-Tacoma airport (SEA).
- 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 2:40 and 3:07.
