WestJet flights from Seattle-Tacoma (SEA) to Ontario, Los Angeles (ONT).

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Fri-Sun 14:30 Seattle-Tacoma (SEA) 17:08 Ontario, Los Angeles (ONT) 2
WestJet WS 7136 Non-stop Embraer EMB 175 (E7W) 2:38 Valid until 2026-01-04
Codeshare flight, operated by Delta Air Lines.(DL 3834)
Mon-Thu,Sat,Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7896 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-06-28 through 2026-07-04
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Mon,Tue,Thu,Sat 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7896 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-06 through 2026-07-11
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Mon,Tue,Thu,Sat,Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7896 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-14 through 2026-07-25
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Mon,Tue,Thu-Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7896 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-27 through 2026-08-04
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Daily 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7896 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-08-05 through 2026-08-29
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Wed,Fri,Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7898 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-03 through 2026-07-08
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Wed,Fri 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7898 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-17 through 2026-07-22
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Mon,Wed,Fri,Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 7933 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-10 through 2026-07-15
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Wed,Fri,Sun 19:55 Seattle-Tacoma (SEA) 22:40 Ontario, Los Angeles (ONT) 2
WestJet WS 8122 Non-stop Embraer EMB 175 (E7W) 2:45 Effective 2026-07-24 through 2026-07-29
Codeshare flight, operated by Delta Air Lines.(DL 3884)
Mon,Fri-Sun 14:30 Seattle-Tacoma (SEA) 17:12 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:42 Effective 2026-03-08 through 2026-03-14
Codeshare flight, operated by Delta Air Lines.(DL 4031)
Mon,Fri-Sun 14:30 Seattle-Tacoma (SEA) 17:13 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:43 Effective 2026-03-15 through 2026-04-12
Codeshare flight, operated by Delta Air Lines.(DL 4031)
Mon,Fri-Sun 14:35 Seattle-Tacoma (SEA) 17:16 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:41 Effective 2026-04-13 through 2026-04-27
Codeshare flight, operated by Delta Air Lines.(DL 4031)
Daily 14:35 Seattle-Tacoma (SEA) 17:16 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:41 Effective 2026-04-28 through 2026-10-05
Codeshare flight, operated by Delta Air Lines.(DL 4031)
Daily 14:35 Seattle-Tacoma (SEA) 17:17 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:42 Effective 2026-10-06 through 2026-10-26
Codeshare flight, operated by Delta Air Lines.(DL 4031)
Mon,Fri-Sun 14:35 Seattle-Tacoma (SEA) 17:17 Ontario, Los Angeles (ONT) 2
WestJet WS 8373 Non-stop Embraer EMB 175 (E7W) 2:42 Effective from 2026-10-30
Codeshare flight, operated by Delta Air Lines.(DL 4031)
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WestJet flights from Seattle-Tacoma (SEA) to Ontario, Los Angeles (ONT).
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
WestJet WS7136
14:30
Seattle-Tacoma (SEA)

17:08
Ontario, Los Angeles (ONT) 2
Valid until 2026-01-04
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3834)
Duration: 2:38, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7896
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-06-28 through 2026-07-04
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7896
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-06 through 2026-07-11
Mon
Tue
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7896
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-14 through 2026-07-25
Mon
Tue
Wed
-
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7896
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-27 through 2026-08-04
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7896
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-08-05 through 2026-08-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7898
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-03 through 2026-07-08
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7898
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-17 through 2026-07-22
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS7933
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-10 through 2026-07-15
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8122
19:55
Seattle-Tacoma (SEA)

22:40
Ontario, Los Angeles (ONT) 2
Effective 2026-07-24 through 2026-07-29
Mon
-
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by Delta Air Lines. (DL 3884)
Duration: 2:45, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:30
Seattle-Tacoma (SEA)

17:12
Ontario, Los Angeles (ONT) 2
Effective 2026-03-08 through 2026-03-14
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:42, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:30
Seattle-Tacoma (SEA)

17:13
Ontario, Los Angeles (ONT) 2
Effective 2026-03-15 through 2026-04-12
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:43, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:35
Seattle-Tacoma (SEA)

17:16
Ontario, Los Angeles (ONT) 2
Effective 2026-04-13 through 2026-04-27
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:41, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:35
Seattle-Tacoma (SEA)

17:16
Ontario, Los Angeles (ONT) 2
Effective 2026-04-28 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:41, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:35
Seattle-Tacoma (SEA)

17:17
Ontario, Los Angeles (ONT) 2
Effective 2026-10-06 through 2026-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:42, non-stop
Embraer EMB 175 (E7W)
Direct Codeshare Flights:
WestJet WS8373
14:35
Seattle-Tacoma (SEA)

17:17
Ontario, Los Angeles (ONT) 2
Effective from 2026-10-30
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Codeshare flight, operated by Delta Air Lines. (DL 4031)
Duration: 2:42, non-stop
Embraer EMB 175 (E7W)
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Parallax here SEA-ONT
  • A domestic route 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 2:38 and 2:45.
All SEA-ONT flights
All WestJet flights
Return (ONT-SEA) flights
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