Airlines with flights from Seattle to Ontario

There are 6 airlines with scheduled flights between SEA and ONT. Alaska Airlines, Delta and Frontier has non-stop flights from Seattle Airport to Ontario International Airport and the flight time is 2 hours and 42 minutes.

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Schedules

Alaska Airlines

Non-stop with Alaska Airlines

  • Total flight time: 2 hours and 42 minutes
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 32 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737MAX 9 Passenger
  • Business and first class available
SEA
Direct
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
AS1364
08:33
08:33
08:33
08:33
08:33
08:33
08:30
AS565
10:25
10:25
10:25
10:25
10:25
10:25
10:25
AS571
13:50
13:50
14:17
13:50
13:50
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13:50
AS592
17:50
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17:50
17:50
17:50
17:50
AS489
20:33
20:33
20:33
20:33
20:33
20:33
20:33
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Delta Air Lines

Non-stop with Delta Air Lines

  • Total flight time: 2 hours and 50 minutes
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 20 flights per week
  • Embraer 175 (Enhanced Winglets)
  • First class available
SEA
Direct
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
DL4070
08:22
08:22
08:22
08:22
08:22
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08:22
DL4031
14:30
14:30
14:30
14:30
14:30
11:50
14:30
DL3884
19:50
19:50
19:50
19:50
19:50
19:50
19:50
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Frontier Airlines

Non-stop with Frontier Airlines

  • Total flight time: 2 hours and 50 minutes
  • Low-cost airline
  • 7 flights per week
  • Airbus A321neo
SEA
Direct
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
F92276
11:54
11:54
12:19
12:19
12:19
12:19
12:19
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Via Sacramento with Southwest Airlines

  • Total flight time: 3h 45m - 6h 05m.
  • Low-cost airline
  • 81 flights per week
SEA
 
Via SMF
 
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
WN3629
WN3805
05:00
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WN3542
WN2882
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05:30
05:30
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WN3542
WN2405
----
05:55
05:55
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06:00
06:55
WN3630
WN300
07:35
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WN4652
WN3089
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12:25
WN888
WN1473
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13:50
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WN3544
WN2291
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15:25
15:25
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WN3543
WN1190
----
15:35
15:35
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WN1665
WN3722
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16:45
WN3566
WN4984
18:05
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SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Alaska Airlines

Via Portland with Alaska Airlines

  • Total flight time: 3h 59m - 6h 16m.
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 169 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737MAX 9 Passenger
SEA
 
Via PDX
 
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
AS2181
AS2093
12:05
12:05
12:05
12:05
12:05
12:05
12:05
AS2302
AS2204
17:59
17:59
17:59
17:59
17:59
17:59
17:59
AS2372
AS2204
19:22
19:22
19:22
19:22
19:22
19:22
19:22
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Via San Jose with Southwest Airlines

  • Total flight time: 4h 10m - 6h 55m.
  • Low-cost airline
  • 50 flights per week
SEA
 
Via SJC
 
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
WN3626
WN3151
06:45
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WN4516
WN2882
----
09:25
09:25
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08:40
WN2396
WN189
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11:35
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WN883
WN3719
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11:50
11:50
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WN4960
WN3691
13:30
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WN1536
WN2377
----
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15:40
15:40
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WN4517
WN3610
----
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15:40
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

Alaska Airlines

Via Boise with Alaska Airlines

  • Total flight time: 4h 13m - 6h 20m.
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 15 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
    Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737MAX 9 Passenger
SEA
 
Via BOI
 
ONT
 
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
AS2230
AS2025
09:59
09:59
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09:59
09:59
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09:59
AS428
AS2025
----
----
10:12
----
----
10:12
----
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - ONT

The timetable & schedule information was updated at 2026-04-22

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At Airlineinformation.com you can learn all about the airlines operating around the world together with their destinations and where they operate. You will get a transparent overview of airlines with scheduled flights between any two destinations with non-stop or 1-stop flights regardless of price or availability.
Flight data on this page was last updated on 2026-07-13
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