Airlines with flights from Ontario to Seattle
There are 6 airlines with scheduled flights between ONT and SEA. Alaska Airlines, Delta and Frontier has non-stop flights from Ontario International Airport to Seattle Airport and the flight time is 2 hours and 42 minutes.
There are 6 airlines with scheduled flights between ONT and SEA. Alaska Airlines, Delta and Frontier has non-stop flights from Ontario International Airport to Seattle Airport and the flight time is 2 hours and 42 minutes. Choose airline
Direct
Non-stop
2h 42min
Direct
Non-stop
3h 0min
Direct
Non-stop
2h 49min
Via Sacramento
4h 5min
Via San Jose
4h 5min
Via Portland
4h 10min
Via Oakland
4h 10min
Via San Francisco
4h 23min
NEW
Via Santa Rosa
4h 36min
Via Las Vegas
4h 40min
Via Salt Lake City
4h 44min
NEW
Via Boise
4h 54min
Via Phoenix
4h 55min
NEW
Via Salt Lake City
5h 16min
Via Phoenix
5h 25min
Via Las Vegas
6h 51min
Schedules
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 737MAX 9 PassengerBoeing 737MAX 8 PassengerBoeing 737-800 (winglets) Passenger/BBJ2Boeing 737-900 (winglets) Passenger/BBJ3
-
Business and first class available
ONT
Direct
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
AS607
06:02
06:02
06:02
06:02
06:02
06:02
06:02
AS654
12:04
12:04
12:04
12:04
12:04
12:04
12:08
AS567
14:05
14:05
14:05
14:05
14:05
14:05
14:05
AS575
17:26
17:26
17:54
17:26
17:26
----
17:26
AS594
21:20
----
----
21:20
21:20
21:20
21:20
The timetable & schedule information was updated at 2026-04-21
Non-stop with Delta Air Lines
-
Total flight time: 3 hours
-
Sky Team Alliance
-
Seattle is a Delta Air Lines hub.
-
20 flights per week
-
Embraer 175 (Enhanced Winglets)
-
First class available
ONT
Direct
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
DL3816
06:20
06:20
06:20
06:20
06:20
06:20
06:20
DL4070
11:56
11:56
11:56
11:56
11:56
----
11:56
DL4031
18:01
18:01
18:01
18:01
18:01
15:35
18:01
The timetable & schedule information was updated at 2026-04-21
Non-stop with Frontier Airlines
-
Total flight time: 2 hours and 49 minutes
-
Low-cost airline
-
7 flights per week
-
Airbus A321neo
ONT
Direct
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
F92275
16:49
16:09
16:09
16:49
16:49
16:09
16:49
The timetable & schedule information was updated at 2026-04-21
Via Sacramento with Southwest Airlines
-
Total flight time: 4h 05m - 6h 20m.
-
Low-cost airline
-
62 flights per week
ONT
Via SMF
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
WN4416
WN563
WN563
----
09:10
09:10
----
----
----
----
WN4416
WN3743
WN3743
----
----
----
----
----
----
10:05
WN2842
WN563
WN563
----
10:55
10:55
----
----
----
----
WN3837
WN3743
WN3743
----
----
----
13:15
13:15
----
----
WN2737
WN2508
WN2508
----
----
----
----
----
----
14:40
WN670
WN555
WN555
15:40
----
----
----
----
----
----
WN3280
WN3323
WN3323
----
----
----
16:10
16:10
----
----
WN2737
WN3096
WN3096
----
----
----
----
----
16:20
----
WN1673
WN3096
WN3096
----
16:45
16:45
----
----
----
----
WN3170
WN4985
WN4985
18:30
----
----
----
----
----
----
WN3100
WN3096
WN3096
----
----
----
----
----
----
18:55
The timetable & schedule information was updated at 2026-04-21
Via San Jose with Southwest Airlines
-
Total flight time: 4h 05m - 6h 25m.
-
Low-cost airline
-
38 flights per week
ONT
Via SJC
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
WN3092
WN389
WN389
----
----
----
----
----
08:35
----
WN2468
WN3195
WN3195
----
09:05
09:05
----
----
----
----
WN3162
WN4982
WN4982
10:45
----
----
----
----
----
----
WN2956
WN3983
WN3983
----
----
----
10:55
10:55
----
----
WN4941
WN3195
WN3195
----
----
----
----
----
----
12:25
WN955
WN2449
WN2449
----
13:15
13:15
----
----
----
----
WN982
WN3297
WN3297
----
----
----
15:40
15:40
----
----
WN3093
WN2752
WN2752
----
----
----
----
----
----
17:35
WN3164
WN3705
WN3705
18:35
----
----
----
----
----
----
The timetable & schedule information was updated at 2026-04-21
Via Portland with Alaska Airlines
-
Total flight time: 4h 10m - 6h 14m.
-
One World Alliance
-
Seattle is a Alaska Airlines hub (Primary hub).
-
86 flights per week
-
Boeing 737MAX 9 PassengerBoeing 737MAX 8 PassengerBoeing 737-800 (winglets) Passenger/BBJ2Boeing 737-900 (winglets) Passenger/BBJ3
ONT
Via PDX
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
AS2238
AS3431
AS3431
07:00
07:00
07:00
07:00
07:00
07:00
07:00
AS1699
AS3408
AS3408
10:54
10:54
10:54
10:54
10:54
10:54
10:54
AS2456
AS2421
AS2421
17:32
17:32
17:32
17:32
17:32
17:32
17:32
The timetable & schedule information was updated at 2026-04-21
Via Oakland with Southwest Airlines
-
Total flight time: 4h 10m - 6h 10m.
-
Low-cost airline
-
55 flights per week
ONT
Via OAK
SEA
W32, Aug 03 - Aug 09
Flight
Mon
Aug 3
Tue
Aug 4
Wed
Aug 5
Thu
Aug 6
Fri
Aug 7
Sat
Aug 8
Sun
Aug 9
WN2615
WN872
WN872
----
----
----
----
----
06:00
----
WN3042
WN3081
WN3081
06:15
----
----
----
----
----
----
WN654
WN4506
WN4506
----
----
----
06:30
06:30
----
----
WN690
WN343
WN343
----
11:10
11:10
----
----
----
----
WN692
WN4412
WN4412
----
14:40
14:40
----
----
----
----
WN1548
WN4300
WN4300
----
----
----
----
----
----
14:50
WN3833
WN2222
WN2222
----
----
----
16:00
16:00
----
----
WN3185
WN2225
WN2225
----
----
----
----
----
----
18:55
The timetable & schedule information was updated at 2026-04-21
Via San Francisco with United
Via Phoenix with American Airlines