All airlines flying from Ontario, Los Angeles (ONT) to Seattle-Tacoma (SEA).
| FLIGHT SCHEDULE |
|---|
| Direct Flights: |
| Mon,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 2026-02-23 through 2026-03-02 |
| Tue,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 2026-02-24 through 2026-02-25 |
| Tue,Thu
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Effective 2026-03-03 through 2026-03-05 |
| Tue,Wed,Sat
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 (73J) 2:50 Effective 2026-03-04 through 2026-03-14 |
| Mon,Thu,Fri
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 2026-03-06 through 2026-03-16 |
| Sun
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 (73J) 2:50 Operates only on 2026-03-15 |
| Tue
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Operates only on 2026-03-17 |
| Daily
16:03
Ontario, Los Angeles (ONT) 2
18:54
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737-800 (73H) 2:51 Effective 2026-01-07 through 2026-02-11 |
| Mon-Wed,Fri,Sun
16:36
Ontario, Los Angeles (ONT) 2
19:27
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 (73J) 2:51 Valid until 2026-01-06 |
| Thu
16:36
Ontario, Los Angeles (ONT) 2
19:27
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737 MAX 9 (7M9) 2:51 Operates only on 2026-01-01 |
| Sat
16:36
Ontario, Los Angeles (ONT) 2
19:27
Seattle-Tacoma (SEA) Alaska Airlines AS 665 Non-stop Boeing 737-800 (73H) 2:51 Operates only on 2026-01-03 |
| Daily
11:51
Ontario, Los Angeles (ONT) 2
14:35
Seattle-Tacoma (SEA) Alaska Airlines AS 706 Non-stop Boeing 737 (73J) 2:44 Effective 2026-05-13 through 2026-06-09 |
| Sun
16:02
Ontario, Los Angeles (ONT) 2
18:52
Seattle-Tacoma (SEA) Alaska Airlines AS 724 Non-stop Boeing 737 (73J) 2:50 Operates only on 2026-03-08 |
| Daily
15:33
Ontario, Los Angeles (ONT) 2
18:22
Seattle-Tacoma (SEA) Alaska Airlines AS 729 Non-stop Boeing 737 (73J) 2:49 Effective 2026-04-22 through 2026-05-12 |
| Daily
07:00
Ontario, Los Angeles (ONT) 2
10:01
Seattle-Tacoma (SEA) Delta Air Lines DL 1071 Non-stop Airbus A220-300 (223) 3:01 Effective 2026-04-13 through 2026-05-06 |
| Daily
12:00
Ontario, Los Angeles (ONT) 2
14:41
Seattle-Tacoma (SEA) Alaska Airlines AS 1363 Non-stop Boeing 737 (73J) 2:41 Effective from 2026-06-10 |
| Daily
16:00
Ontario, Los Angeles (ONT) 2
18:41
Seattle-Tacoma (SEA) Alaska Airlines AS 1367 Non-stop Boeing 737 (73J) 2:41 Effective from 2026-06-10 |
| Daily
19:20
Ontario, Los Angeles (ONT) 2
22:00
Seattle-Tacoma (SEA) Alaska Airlines AS 1399 Non-stop Boeing 737 (73J) 2:40 Effective 2026-05-13 through 2026-06-09 |
| Daily
14:21
Ontario, Los Angeles (ONT) 2
17:02
Seattle-Tacoma (SEA) Alaska Airlines AS 1475 Non-stop Boeing 737 (73J) 2:41 Effective 2026-06-10 through 2026-08-18 |
| Sun
14:27
Ontario, Los Angeles (ONT)
17:20
Seattle-Tacoma (SEA) Frontier Airlines F9 2275 Non-stop Airbus A320neo (32N) 2:53 Valid until 2026-01-04 |
| Tue,Fri
14:45
Ontario, Los Angeles (ONT)
17:38
Seattle-Tacoma (SEA) Frontier Airlines F9 2275 Non-stop Airbus A320neo (32N) 2:53 Valid until 2026-01-02 |
| Mon
14:45
Ontario, Los Angeles (ONT)
17:38
Seattle-Tacoma (SEA) Frontier Airlines F9 2275 Non-stop Airbus A321neo (32Q) 2:53 Valid until 2026-01-05 |
| Sat
15:50
Ontario, Los Angeles (ONT)
18:43
Seattle-Tacoma (SEA) Frontier Airlines F9 2275 Non-stop Airbus A320neo (32N) 2:53 Valid until 2026-01-03 |
| Thu,Sun
17:15
Ontario, Los Angeles (ONT)
20:08
Seattle-Tacoma (SEA) Frontier Airlines F9 2275 Non-stop Airbus A321neo (32Q) 2:53 Effective 2026-01-08 through 2026-01-11 |
| Daily
15:30
Ontario, Los Angeles (ONT) 2
18:33
Seattle-Tacoma (SEA) Delta Air Lines DL 3697 Non-stop Embraer EMB 175 (E7W) 3:03 Effective 2026-02-12 through 2026-03-07 |
| Daily
07:00
Ontario, Los Angeles (ONT) 2
10:01
Seattle-Tacoma (SEA) Delta Air Lines DL 3816 Non-stop Embraer EMB 175 (E7W) 3:01 Effective 2026-05-07 through 2026-10-05 |
| Daily
07:00
Ontario, Los Angeles (ONT) 2
10:05
Seattle-Tacoma (SEA) Delta Air Lines DL 3816 Non-stop Embraer EMB 175 (E7W) 3:05 Effective from 2026-10-06 |
| Daily
14:00
Ontario, Los Angeles (ONT) 2
17:00
Seattle-Tacoma (SEA) Delta Air Lines DL 3819 Non-stop Embraer EMB 175 (E7W) 3:00 Effective from 2026-05-07 |
| Mon,Tue,Fri-Sun
17:49
Ontario, Los Angeles (ONT) 2
20:49
Seattle-Tacoma (SEA) Delta Air Lines DL 3834 Non-stop Embraer EMB 175 (E7W) 3:00 Valid until 2026-01-04 |
| Daily
15:30
Ontario, Los Angeles (ONT) 2
18:35
Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 3:05 Effective 2026-01-05 through 2026-02-11 |
| Daily
17:50
Ontario, Los Angeles (ONT) 2
20:50
Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 3:00 Effective from 2026-10-06 |
| Daily
17:53
Ontario, Los Angeles (ONT) 2
20:50
Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:57 Effective 2026-03-08 through 2026-04-12 |
| Daily
17:55
Ontario, Los Angeles (ONT) 2
20:50
Seattle-Tacoma (SEA) Delta Air Lines DL 4031 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2026-04-13 through 2026-10-05 |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:55
Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 2:55 Effective 2026-03-08 through 2026-04-12 |
| Daily
06:38
Ontario, Los Angeles (ONT) 2
09:45
Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 3:07 Valid until 2026-01-04 |
| Daily
07:30
Ontario, Los Angeles (ONT) 2
10:36
Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 3:06 Effective 2026-01-05 through 2026-02-11 |
| Daily
07:30
Ontario, Los Angeles (ONT) 2
10:34
Seattle-Tacoma (SEA) Delta Air Lines DL 4042 Non-stop Embraer EMB 175 (E7W) 3:04 Effective 2026-02-12 through 2026-03-07 |
| Mon,Tue,Fri-Sun
11:42
Ontario, Los Angeles (ONT) 2
14:45
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:03 Valid until 2026-01-04 |
| Daily
11:55
Ontario, Los Angeles (ONT) 2
14:56
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:01 Effective 2026-04-13 through 2026-10-05 |
| Daily
11:55
Ontario, Los Angeles (ONT) 2
14:58
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:03 Effective from 2026-10-06 |
| Daily
11:59
Ontario, Los Angeles (ONT) 2
14:53
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:54 Effective 2026-03-08 through 2026-03-14 |
| Daily
11:59
Ontario, Los Angeles (ONT) 2
14:55
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 2:56 Effective 2026-03-15 through 2026-04-12 |
| Wed,Thu
14:50
Ontario, Los Angeles (ONT) 2
17:50
Seattle-Tacoma (SEA) Delta Air Lines DL 4070 Non-stop Embraer EMB 175 (E7W) 3:00 Valid until 2026-01-01 |
| Non-Direct Flights: |
| Mon,Thu,Fri
15:00
Ontario, Los Angeles (ONT) 4
20:05
Seattle-Tacoma (SEA) Southwest Airlines WN 1474 1-stop Boeing 737-800 (73H) 5:05 Effective 2026-04-09 through 2026-06-01 |
| Mon,Thu,Fri
19:30
Ontario, Los Angeles (ONT) 4
23:30
Seattle-Tacoma (SEA) Southwest Airlines WN 3082 1-stop Boeing 737-700 (Scimitar Winglets) 4:00 Effective 2026-06-04 through 2026-08-03 |
| Sun
12:45
Ontario, Los Angeles (ONT) 4
17:40
Seattle-Tacoma (SEA) Southwest Airlines WN 3585 1-stop Boeing 737-700 (Scimitar Winglets) 4:55 Effective 2026-06-07 through 2026-08-02 |
| Direct Codeshare Flights: |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:42
Seattle-Tacoma (SEA) Qatar Airways QR 2107 Non-stop Boeing 737 (73J) 2:42 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 599) |
| Daily
11:51
Ontario, Los Angeles (ONT) 2
14:35
Seattle-Tacoma (SEA) Qatar Airways QR 2110 Non-stop Boeing 737 (73J) 2:44 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 706) |
| Daily
06:00
Ontario, Los Angeles (ONT) 2
08:44
Seattle-Tacoma (SEA) Qatar Airways QR 2126 Non-stop Boeing 737 (73J) 2:44 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 532) |
| Daily
12:00
Ontario, Los Angeles (ONT) 2
14:41
Seattle-Tacoma (SEA) Qatar Airways QR 2127 Non-stop Boeing 737 (73J) 2:41 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 1363) |
- 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.
