Find Cheap Flights from Seattle to Ontario

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
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Book cheap flights from Seattle to Ontario

(Round-trip)
Depart: Mon May 1 2017 Return: Tue May 2 2017 Trip spans 2 days
American Airlines
American Airlines
SEA
11:00a
ONT
5:45p
6h 45m
1 stop
ONT
8:45a
SEA
4:16p
7h 31m
1 stop
Depart: Thu Aug 3 2017 Return: Mon Aug 7 2017 Trip spans 5 days
Southwest
Southwest
SEA
1:35a
ONT
5:50a
4h 15m
1 stop
ONT
1:15a
SEA
5:35a
4h 20m
1 stop
Depart: Wed May 17 2017 Return: Wed May 31 2017 Trip spans 15 days
Major Airline
Major Airline
SEA
6:00a
ONT
12:10p
6h 10m
1 stop
ONT
3:00a
SEA
9:21a
6h 21m
1 stop
Depart: Tue May 9 2017 Return: Wed May 17 2017 Trip spans 9 days
United
United
SEA
2:00a
ONT
6:06a
4h 06m
1 stop
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
Depart: Wed May 31 2017 Return: Tue Jun 6 2017 Trip spans 7 days
Delta
Delta
SEA
2:25p
ONT
6:58p
4h 33m
1 stop
ONT
12:46p
SEA
7:10p
6h 24m
1 stop
Depart: Wed May 24 2017 Return: Wed May 31 2017 Trip spans 8 days
Alaska Airlines
Alaska Airlines
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
ONT
1:30p
SEA
4:11p
2h 41m
nonstop
Depart: Tue May 2 2017 Return: Wed May 3 2017 Trip spans 2 days
American Airlines
American Airlines
SEA
11:00a
ONT
5:45p
6h 45m
1 stop
ONT
2:20a
SEA
9:49a
7h 29m
1 stop
Depart: Wed May 3 2017 Return: Fri May 5 2017 Trip spans 3 days
American Airlines
American Airlines
SEA
1:00a
ONT
7:41a
6h 41m
1 stop
ONT
8:45a
SEA
4:16p
7h 31m
1 stop
Depart: Wed May 10 2017 Return: Wed May 17 2017 Trip spans 8 days
United
United
SEA
11:30a
ONT
4:36p
5h 06m
1 stop
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
Depart: Sun May 21 2017 Return: Wed May 24 2017 Trip spans 4 days
Major Airline
Major Airline
SEA
10:23p
ONT
2:23a
4h 00m
1 stop
ONT
3:00a
SEA
7:17a
4h 17m
1 stop
Depart: Sat May 13 2017 Return: Wed May 17 2017 Trip spans 5 days
United
United
SEA
3:10p
ONT
8:11p
5h 01m
1 stop
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
Depart: Sun Jul 16 2017 Return: Thu Jul 20 2017 Trip spans 5 days
Major Airline
Major Airline
SEA
10:25p
ONT
2:20a
3h 55m
1 stop
ONT
2:58a
SEA
7:29a
4h 31m
1 stop
Depart: Thu Sep 7 2017 Return: Sat Sep 9 2017 Trip spans 3 days
Delta
Delta
SEA
7:15a
ONT
12:28p
5h 13m
1 stop
ONT
9:00a
SEA
2:00p
5h 00m
1 stop
Depart: Sat May 27 2017 Return: Wed May 31 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SEA
3:50p
ONT
6:15p
2h 25m
nonstop
ONT
1:30p
SEA
4:11p
2h 41m
nonstop
Depart: Mon May 15 2017 Return: Wed May 17 2017 Trip spans 3 days
United
United
SEA
11:30a
ONT
3:36p
4h 06m
1 stop
ONT
6:40a
SEA
2:18p
7h 38m
1 stop
Depart: Sun May 28 2017 Return: Wed May 31 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
4:15p
ONT
6:40p
2h 25m
nonstop
ONT
1:30p
SEA
4:11p
2h 41m
nonstop
Depart: Tue May 16 2017 Return: Wed May 17 2017 Trip spans 2 days
United
United
SEA
2:00a
ONT
6:06a
4h 06m
1 stop
ONT
3:10p
SEA
9:13p
6h 03m
1 stop
Depart: Wed Aug 23 2017 Return: Sun Aug 27 2017 Trip spans 5 days
Major Airline
Major Airline
SEA
1:45a
ONT
8:20a
6h 35m
1 stop
ONT
12:45p
SEA
9:55p
9h 10m
1 stop
Depart: Tue May 30 2017 Return: Wed May 31 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
SEA
10:00a
ONT
12:30p
2h 30m
nonstop
ONT
1:30p
SEA
4:11p
2h 41m
nonstop
Depart: Fri May 5 2017 Return: Wed May 10 2017 Trip spans 6 days
Delta
Delta
SEA
2:25p
ONT
6:58p
4h 33m
1 stop
ONT
2:00a
SEA
6:55a
4h 55m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Airports
Origin

Seattle
$160
Destination

Ontario
$160
Airlines Airline reviews

55 travelers who booked a flight from Seattle to Ontario rated their chosen airlines with an average of 8.4.

Overall
8.7
Boarding
8.6
Crew
8.7
Comfort
8.5
Food
7.9
Entertainment
7.4