Find Cheap Flights 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/Tacoma Intl to Ontario

(Round-trip)
Depart: Mon Sep 11 2017 Return: Mon Sep 18 2017 Trip spans 8 days
United
United
SEA
12:00a
ONT
4:49a
4h 49m
1 stop
ONT
12:00a
SEA
4:12a
4h 12m
1 stop
Depart: Sat Sep 9 2017 Return: Tue Sep 12 2017 Trip spans 4 days
American Airlines
American Airlines
SEA
12:00a
ONT
6:43a
6h 43m
1 stop
ONT
12:00a
SEA
7:24a
7h 24m
1 stop
Depart: Wed Sep 13 2017 Return: Mon Sep 18 2017 Trip spans 6 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
4:12a
4h 12m
1 stop
Depart: Tue Sep 12 2017 Return: Wed Sep 13 2017 Trip spans 2 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
2:33a
2h 33m
nonstop
Depart: Mon Nov 20 2017 Return: Tue Nov 28 2017 Trip spans 9 days
Delta
Delta
SEA
12:00a
ONT
4:47a
4h 47m
1 stop
ONT
12:00a
SEA
6:25a
6h 25m
1 stop
Depart: Wed Nov 1 2017 Return: Tue Nov 7 2017 Trip spans 7 days
United
United
SEA
12:00a
ONT
4:39a
4h 39m
1 stop
ONT
12:00a
SEA
4:28a
4h 28m
1 stop
Depart: Sat Nov 4 2017 Return: Tue Nov 14 2017 Trip spans 11 days
United
United
SEA
12:00a
ONT
4:27a
4h 27m
1 stop
ONT
12:00a
SEA
4:28a
4h 28m
1 stop
Depart: Thu Aug 24 2017 Return: Fri Aug 25 2017 Trip spans 2 days
American Airlines
American Airlines
SEA
12:00a
ONT
6:52a
6h 52m
1 stop
ONT
12:00a
SEA
7:03a
7h 03m
1 stop
Depart: Wed Sep 27 2017 Return: Wed Oct 11 2017 Trip spans 15 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
ONT
4:24a
4h 24m
1 stop
ONT
12:00a
SEA
2:38a
2h 38m
nonstop
Depart: Sat Sep 16 2017 Return: Wed Oct 4 2017 Trip spans 19 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
2:33a
2h 33m
nonstop
Depart: Sat Feb 3 2018 Return: Sun Feb 18 2018 Trip spans 16 days
Delta
Delta
SEA
12:00a
ONT
7:46a
7h 46m
1 stop
ONT
12:00a
SEA
6:23a
6h 23m
1 stop
Depart: Thu Oct 5 2017 Return: Sat Oct 7 2017 Trip spans 3 days
Multiple Airlines
Multiple Airlines
SEA
12:00a
ONT
2:27a
2h 27m
nonstop
ONT
12:00a
SEA
7:24a
7h 24m
1 stop
Depart: Wed Sep 27 2017 Return: Sat Sep 30 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
2:33a
2h 33m
nonstop
Depart: Tue Jan 2 2018 Return: Tue Jan 9 2018 Trip spans 8 days
United
United
SEA
12:00a
ONT
5:38a
5h 38m
1 stop
ONT
12:00a
SEA
4:51a
4h 51m
1 stop
Depart: Sun Sep 3 2017 Return: Sat Sep 9 2017 Trip spans 7 days
American Airlines
American Airlines
SEA
12:00a
ONT
6:43a
6h 43m
1 stop
ONT
12:00a
SEA
7:24a
7h 24m
1 stop
Depart: Sat Sep 30 2017 Return: Wed Oct 4 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
2:36a
2h 36m
nonstop
Depart: Mon Aug 28 2017 Return: Fri Sep 8 2017 Trip spans 12 days
United
United
SEA
12:00a
ONT
7:04a
7h 04m
1 stop
ONT
12:00a
SEA
4:12a
4h 12m
1 stop
Depart: Sat Sep 9 2017 Return: Wed Sep 13 2017 Trip spans 5 days
American Airlines
American Airlines
SEA
12:00a
ONT
6:43a
6h 43m
1 stop
ONT
12:00a
SEA
2:33a
2h 33m
nonstop
Depart: Tue Aug 29 2017 Return: Tue Sep 12 2017 Trip spans 15 days
United
United
SEA
12:00a
ONT
5:31a
5h 31m
1 stop
ONT
12:00a
SEA
4:12a
4h 12m
1 stop
Depart: Fri Sep 15 2017 Return: Wed Oct 4 2017 Trip spans 20 days
Alaska Airlines
Alaska Airlines
SEA
12:00a
ONT
2:31a
2h 31m
nonstop
ONT
12:00a
SEA
2:33a
2h 33m
nonstop
Direct flights SEA to ONT on American Airlines
Flight # Depart SEA Arrive ONT Sun Mon Tue Wed Thu Fri Sat Valid Between
7025 7:30 am 10:01 am Sep 1 - Sep 11
7025 7:30 am 10:01 am Aug 27 - Sep 3
7025 7:30 am 10:01 am Sep 5 - Sep 10
7025 7:30 am 10:01 am Sep 12 - Sep 19
7025 7:30 am 10:01 am Sep 14 - Sep 20
7025 7:30 am 10:01 am Sep 21 - Sep 26
7025 7:30 am 10:01 am Sep 22 - Sep 28
7025 7:30 am 10:01 am Sep 29 - Oct 1
7005 1:45 pm 4:17 pm Sep 16 - Sep 23
7005 1:45 pm 4:17 pm Sep 17 - Sep 25
7005 1:45 pm 4:17 pm Sep 26 - Sep 29
7005 1:45 pm 4:17 pm Sep 28 - Oct 1
7005 1:45 pm 4:17 pm Aug 27 - Sep 3
7005 1:50 pm 4:22 pm Sep 4 - Sep 10
7005 1:50 pm 4:22 pm Sep 12 - Sep 15
7005 1:50 pm 4:22 pm Sep 8 - Sep 11
7021 9:10 pm 11:41 pm Sep 16 - Sep 23
7021 9:10 pm 11:41 pm Sep 9 - Sep 15
7021 9:10 pm 11:41 pm Sep 25 - Oct 1
7021 9:10 pm 11:41 pm Sep 24 - Sep 27
7021 9:10 pm 11:41 pm Sep 17 - Sep 21
7021 9:10 pm 11:41 pm Sep 7 - Sep 8
7021 9:10 pm 11:41 pm Aug 29 - Sep 6
7021 9:10 pm 11:41 pm Aug 27 - Aug 31
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

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Airports
Origin

Seattle
$144
Destination

Ontario
$144
Airlines Airline reviews

75 travelers who booked a flight from Seattle to Ontario rated their chosen airlines with an average of 8.6.

Overall
8.9
Boarding
8.7
Crew
8.9
Comfort
8.6
Food
8.1
Entertainment
7.6