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

Select flight date:
FLIGHT SCHEDULE
Non-Direct Flights:
Sun 08:10 Seattle-Tacoma (SEA) 12:15 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 2084 1-stop Boeing 737-700 (Scimitar Winglets) 4:05 Effective 2026-03-08 through 2026-04-05
Sun 13:25 Seattle-Tacoma (SEA) 17:50 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 3521 1-stop Boeing 737 MAX 8 (7M8) 4:25 Effective 2026-04-12 through 2026-05-17
Sun 13:25 Seattle-Tacoma (SEA) 17:50 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 3521 1-stop Boeing 737 MAX 8 (7M8) 4:25 Operates only on 2026-05-31
Sun 19:35 Seattle-Tacoma (SEA) 23:50 Ontario, Los Angeles (ONT) 4
Southwest Airlines WN 3929 1-stop Boeing 737-800 (73H) 4:15 Effective 2026-06-07 through 2026-08-02




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Southwest Airlines flights from Seattle-Tacoma (SEA) to Ontario, Los Angeles (ONT).
Select flight date:
FLIGHT SCHEDULE
Non-Direct Flights:
Southwest Airlines WN2084
08:10
Seattle-Tacoma (SEA)

12:15
Ontario, Los Angeles (ONT) 4
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
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Thu
-
Fri
-
Sat
-
Sun
Duration: 4:05, 1-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN3521
13:25
Seattle-Tacoma (SEA)

17:50
Ontario, Los Angeles (ONT) 4
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3521
13:25
Seattle-Tacoma (SEA)

17:50
Ontario, Los Angeles (ONT) 4
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:25, 1-stop
Boeing 737 MAX 8 (7M8)
Non-Direct Flights:
Southwest Airlines WN3929
19:35
Seattle-Tacoma (SEA)

23:50
Ontario, Los Angeles (ONT) 4
Effective 2026-06-07 through 2026-08-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:15, 1-stop
Boeing 737-800 (73H)
  • 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...).
All SEA-ONT flights
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Return (ONT-SEA) flights
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