Airlines with flights from Seattle to Ontario
There are five airlines with scheduled flights between SEA and ONT. Alaska Airlines, Delta and Frontier Airlines has non-stop flights from Seattle Airport to Ontario International Airport and the flight time is 2 hours and 34 minutes.
Choose airline
Schedules

Non-stop with Alaska Airlines
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Total flight time: 2 hours and 34 minutes
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One World Alliance
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Seattle is a Alaska Airlines hub (Primary hub).
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18 flights per week
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Boeing 737-800 (winglets) Passenger/BBJ2Boeing 737-900 PassengerBoeing 737-900 (winglets) Passenger/BBJ3Boeing 737-700 PassengerBoeing 737MAX 9 Passenger
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Business and first class available
SEA
Direct
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
AS1254
08:25
08:25
08:25
08:25
08:25
08:25
08:25
AS1086
15:49
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15:49
15:49
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15:49
AS1024
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17:45
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AS1088
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18:55
18:55
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AS1003
20:49
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20:49
20:49
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20:49
The timetable & schedule information was updated at 2025-02-17
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Non-stop with Delta Air Lines
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Total flight time: 2 hours and 47 minutes
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Sky Team Alliance
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Seattle is a Delta Air Lines hub.
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14 flights per week
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Embraer 175 (Enhanced Winglets)
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First class available
SEA
Direct
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
DL4070
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----
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08:15
DL4031
12:40
12:40
12:40
12:40
12:40
12:40
13:59
DL4027
19:45
19:45
19:45
19:45
19:45
19:45
19:40
The timetable & schedule information was updated at 2025-02-17

Non-stop with Frontier Airlines
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Total flight time: 2 hours and 37 minutes
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Low-cost airline
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4 flights per week
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Airbus A320neoA321neo
SEA
Direct
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
F93163
13:36
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12:52
12:52
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12:52
The timetable & schedule information was updated at 2025-02-17

Via Salt Lake City with Delta Air Lines
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Total flight time: 4h 37m - 6h 56m.
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Sky Team Alliance
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Seattle is a Delta Air Lines hub.
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26 flights per week
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Embraer 175 (Enhanced Winglets)
SEA
Via SLC
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
DL1128
DL1345
DL1345
05:30
05:30
05:30
05:30
05:30
05:30
05:30
DL1016
DL3933
DL3933
09:55
09:55
09:55
09:55
09:55
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10:15
DL1165
DL1614
DL1614
17:05
17:05
17:05
17:05
17:05
17:05
17:10
DL1239
DL1614
DL1614
19:10
19:10
19:10
19:10
19:10
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18:56
The timetable & schedule information was updated at 2025-02-17
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Via Phoenix with American Airlines
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Total flight time: 5h 21m - 7h 11m.
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One World Alliance
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15 flights per week
SEA
Via PHX
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
AA4952
AA1792
AA1792
06:30
06:30
06:30
06:38
06:38
06:38
06:35
AA6341
AA1666
AA1666
11:40
11:40
11:40
11:25
11:25
11:25
11:25
AA6337
AA1238
AA1238
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15:00
15:00
15:00
15:00
AA6234
AA1356
AA1356
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17:45
The timetable & schedule information was updated at 2025-02-17
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Via Portland with Alaska Airlines
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Total flight time: 3h 46m - 5h 54m.
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One World Alliance
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Seattle is a Alaska Airlines hub (Primary hub).
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15 flights per week
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Boeing 737-800 (winglets) Passenger/BBJ2Boeing 737-900 PassengerBoeing 737-900 (winglets) Passenger/BBJ3Boeing 737-700 PassengerBoeing 737MAX 9 Passenger
SEA
Via PDX
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
AS2111
AS3312
AS3312
06:42
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06:42
06:42
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AS1039
AS2235
AS2235
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----
----
----
----
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11:36
AS1039
AS2074
AS2074
11:36
11:36
11:36
11:36
11:36
11:36
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AS3491
AS1066
AS1066
18:32
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18:32
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AS2225
AS1066
AS1066
----
----
----
----
----
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18:41
AS2387
AS1066
AS1066
19:50
----
----
19:50
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19:50
19:50
The timetable & schedule information was updated at 2025-02-17
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Via Oakland with Southwest Airlines
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Total flight time: 4h 15m - 6h 25m.
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Low-cost airline
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13 flights per week
SEA
Via OAK
ONT
W10, Mar 03 - Mar 09
Flight
Mon
Mar 3
Tue
Mar 4
Wed
Mar 5
Thu
Mar 6
Fri
Mar 7
Sat
Mar 8
Sun
Mar 9
WN294
WN1748
WN1748
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----
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05:20
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WN546
WN3222
WN3222
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----
05:45
05:45
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WN4833
WN1067
WN1067
05:55
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----
----
----
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WN546
WN2979
WN2979
----
----
----
----
----
----
05:55
WN3199
WN1067
WN1067
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06:00
06:00
----
----
----
----
WN1088
WN1471
WN1471
----
----
----
----
----
----
06:15
WN1295
WN930
WN930
----
----
----
06:40
06:40
----
----
WN1295
WN2565
WN2565
----
----
----
06:40
06:40
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----
WN4527
WN1719
WN1719
06:50
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----
----
----
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WN4527
WN3102
WN3102
06:50
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----
----
----
----
----
WN1469
WN2661
WN2661
----
----
----
07:00
07:00
----
----
WN297
WN2159
WN2159
----
07:00
07:00
----
----
----
----
WN823
WN3131
WN3131
07:15
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----
----
----
----
----
WN988
WN2528
WN2528
----
08:50
08:50
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----
----
----
WN2626
WN2980
WN2980
----
----
----
----
----
08:55
----
WN1249
WN1286
WN1286
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09:10
09:10
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----
----
----
WN1339
WN1564
WN1564
----
----
----
----
----
10:00
----
WN4433
WN1788
WN1788
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10:10
10:10
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----
----
----
WN1541
WN1916
WN1916
11:10
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----
----
----
----
----
WN2725
WN2796
WN2796
----
----
----
11:40
11:40
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----
WN1059
WN1916
WN1916
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12:25
12:25
----
----
----
----
WN2483
WN553
WN553
----
----
----
13:10
13:10
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----
WN266
WN4900
WN4900
13:30
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----
----
----
----
----
WN3735
WN4702
WN4702
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13:40
13:40
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----
----
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WN4211
WN945
WN945
14:40
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----
----
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WN3456
WN1564
WN1564
----
----
----
15:00
15:00
----
----
WN4380
WN4589
WN4589
----
15:15
15:15
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----
----
----
WN266
WN4626
WN4626
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15:25
15:25
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----
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WN3735
WN1657
WN1657
16:20
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----
----
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WN1719
WN3686
WN3686
----
----
----
----
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17:10
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WN244
WN4318
WN4318
----
----
----
----
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17:30
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WN138
WN5290
WN5290
----
----
----
----
----
18:55
----
WN4153
WN5172
WN5172
----
----
----
19:00
19:00
----
----
The timetable & schedule information was updated at 2025-02-17