Find Deals on Flights from Washington to Ontario (WAS - ONT)

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 Washington to Ontario

(Round-trip)
Depart: Tue May 2 2017 Return: Sat May 6 2017 Trip spans 5 days
Major Airline
Major Airline
IAD
9:30a
ONT
4:52a
19h 22m
1 stop
ONT
10:20p
IAD
5:24a
31h 04m
1 stop
Depart: Tue Mar 28 2017 Return: Tue Apr 4 2017 Trip spans 8 days
United
United
IAD
2:35a
ONT
10:51a
8h 16m
1 stop
ONT
1:40a
IAD
9:25a
7h 45m
1 stop
Depart: Tue Apr 18 2017 Return: Mon Apr 24 2017 Trip spans 7 days
American Airlines
American Airlines
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
ONT
9:15p
DCA
3:52a
6h 37m
1 stop
Depart: Sat Aug 26 2017 Return: Sat Sep 2 2017 Trip spans 8 days
Delta
Delta
DCA
12:45p
ONT
8:02p
7h 17m
1 stop
ONT
2:00a
DCA
8:50a
6h 50m
1 stop
Depart: Wed May 31 2017 Return: Mon Jun 5 2017 Trip spans 6 days
Major Airline
Major Airline
IAD
9:30a
ONT
6:25a
20h 55m
1 stop
ONT
9:15a
IAD
5:17a
20h 02m
1 stop
Depart: Wed Mar 29 2017 Return: Tue Apr 4 2017 Trip spans 7 days
United
United
IAD
2:35a
ONT
10:51a
8h 16m
1 stop
ONT
1:40a
IAD
9:25a
7h 45m
1 stop
Depart: Thu May 4 2017 Return: Sat May 6 2017 Trip spans 3 days
Major Airline
Major Airline
IAD
9:30a
ONT
4:52a
19h 22m
1 stop
ONT
10:20p
IAD
5:24a
31h 04m
1 stop
Depart: Wed Apr 19 2017 Return: Mon Apr 24 2017 Trip spans 6 days
American Airlines
American Airlines
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
ONT
9:15p
DCA
3:52a
6h 37m
1 stop
Depart: Thu Mar 30 2017 Return: Tue Apr 4 2017 Trip spans 6 days
United
United
IAD
2:35a
ONT
10:51a
8h 16m
1 stop
ONT
9:25a
IAD
3:56p
6h 31m
1 stop
Depart: Wed Apr 26 2017 Return: Tue May 2 2017 Trip spans 7 days
American Airlines
American Airlines
DCA
2:59a
ONT
12:38p
9h 39m
1 stop
ONT
10:30a
DCA
5:09p
6h 39m
1 stop
Depart: Wed Mar 22 2017 Return: Mon Mar 27 2017 Trip spans 6 days
Major Airline
Major Airline
DCA
12:00a
ONT
4:52a
28h 52m
1 stop
ONT
9:30a
DCA
10:33a
25h 03m
1 stop
Depart: Tue Mar 14 2017 Return: Wed Mar 15 2017 Trip spans 2 days
United
United
IAD
12:15p
ONT
7:14p
6h 59m
1 stop
ONT
1:35a
IAD
8:10a
6h 35m
1 stop
Depart: Sat Apr 22 2017 Return: Fri May 5 2017 Trip spans 14 days
American Airlines
American Airlines
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
ONT
10:30a
DCA
5:09p
6h 39m
1 stop
Depart: Thu Mar 23 2017 Return: Tue Mar 28 2017 Trip spans 6 days
Major Airline
Major Airline
IAD
9:30a
ONT
11:31a
26h 01m
2 stops
ONT
3:45a
IAD
5:15a
25h 30m
2 stops
Depart: Wed Mar 15 2017 Return: Wed Mar 22 2017 Trip spans 8 days
United
United
IAD
10:20a
ONT
7:14p
8h 54m
1 stop
ONT
8:30a
IAD
5:57p
9h 27m
1 stop
Depart: Fri Mar 3 2017 Return: Wed Mar 8 2017 Trip spans 6 days
Delta
Delta
DCA
11:40a
ONT
9:10p
9h 30m
1 stop
ONT
1:00a
DCA
7:45a
6h 45m
1 stop
Depart: Sun Apr 2 2017 Return: Tue Apr 4 2017 Trip spans 3 days
Major Airline
Major Airline
IAD
9:30a
ONT
5:21p
31h 51m
1 stop
ONT
10:20p
IAD
5:15a
30h 55m
1 stop
Depart: Sat Mar 18 2017 Return: Tue Mar 21 2017 Trip spans 4 days
United
United
IAD
12:45p
ONT
11:06p
10h 21m
1 stop
ONT
6:45a
IAD
2:14p
7h 29m
1 stop
Depart: Sun Apr 30 2017 Return: Tue May 2 2017 Trip spans 3 days
American Airlines
American Airlines
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
ONT
10:30a
DCA
5:09p
6h 39m
1 stop
Depart: Thu Apr 20 2017 Return: Sun Apr 30 2017 Trip spans 11 days
Major Airline
Major Airline
IAD
9:30a
ONT
4:52a
19h 22m
1 stop
ONT
10:20p
IAD
5:19a
30h 59m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
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.

If you have more questions or if you have a bad price to report to us,
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Airports
Origin

Washington
only $304
only $350
Destination

Ontario
$304