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.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

Dates flexible? Here are the best fares found in the past 48 hours...

Book cheap flights from Washington to Ontario

(Round-trip)
Depart: Tue Aug 30 2016 Return: Mon Sep 5 2016 Trip spans 7 days
Major Airline
Major Airline
DCA
9:25p
ONT
8:47a
11h 22m
2 stops
ONT
10:05p
DCA
8:20a
10h 15m
2 stops
Depart: Wed May 18 2016 Return: Tue May 24 2016 Trip spans 7 days
United
United
IAD
2:12a
ONT
10:21a
8h 09m
1 stop
ONT
3:46p
IAD
11:30p
7h 44m
1 stop
Depart: Tue Aug 23 2016 Return: Tue Aug 30 2016 Trip spans 8 days
American Airlines
American Airlines
DCA
1:39a
ONT
8:57a
7h 18m
1 stop
ONT
8:59p
DCA
6:10a
9h 11m
1 stop
Depart: Mon Aug 29 2016 Return: Thu Sep 8 2016 Trip spans 11 days
Delta
Delta
DCA
12:45p
ONT
9:38p
8h 53m
1 stop
ONT
2:00a
DCA
8:53a
6h 53m
1 stop
Depart: Tue May 17 2016 Return: Tue May 24 2016 Trip spans 8 days
Major Airline
Major Airline
IAD
12:20a
ONT
11:30a
11h 10m
1 stop
ONT
12:46p
IAD
8:39p
7h 53m
1 stop
Depart: Thu May 26 2016 Return: Thu Jun 2 2016 Trip spans 8 days
United
United
IAD
7:37a
ONT
6:16p
10h 39m
1 stop
ONT
11:26a
IAD
7:28p
8h 02m
1 stop
Depart: Wed Aug 24 2016 Return: Tue Aug 30 2016 Trip spans 7 days
American Airlines
American Airlines
DCA
1:39a
ONT
8:57a
7h 18m
1 stop
ONT
8:59p
DCA
6:10a
9h 11m
1 stop
Depart: Thu Sep 1 2016 Return: Thu Sep 8 2016 Trip spans 8 days
Delta
Delta
DCA
12:45p
ONT
9:38p
8h 53m
1 stop
ONT
2:00a
DCA
8:53a
6h 53m
1 stop
Depart: Wed Jun 1 2016 Return: Thu Jun 2 2016 Trip spans 2 days
United
United
IAD
2:12a
ONT
10:21a
8h 09m
1 stop
ONT
11:26a
IAD
7:28p
8h 02m
1 stop
Depart: Tue Sep 13 2016 Return: Fri Sep 16 2016 Trip spans 4 days
American Airlines
American Airlines
DCA
1:39a
ONT
8:57a
7h 18m
1 stop
ONT
8:59p
DCA
6:10a
9h 11m
1 stop
Depart: Mon Nov 7 2016 Return: Tue Nov 15 2016 Trip spans 9 days
Delta
Delta
DCA
11:30a
ONT
8:42p
9h 12m
1 stop
ONT
1:00a
DCA
7:42a
6h 42m
1 stop
Depart: Sun May 29 2016 Return: Tue May 31 2016 Trip spans 3 days
Major Airline
Major Airline
DCA
4:00a
ONT
1:14p
9h 14m
2 stops
ONT
3:00a
DCA
1:42p
10h 42m
2 stops
Depart: Tue Jun 7 2016 Return: Wed Jun 8 2016 Trip spans 2 days
United
United
IAD
2:00a
ONT
10:21a
8h 21m
1 stop
ONT
4:46p
IAD
12:49a
8h 03m
1 stop
Depart: Wed Sep 14 2016 Return: Sat Sep 17 2016 Trip spans 4 days
American Airlines
American Airlines
DCA
1:39a
ONT
8:57a
7h 18m
1 stop
ONT
8:59p
DCA
4:02a
7h 03m
1 stop
Depart: Sat Jun 18 2016 Return: Mon Jun 20 2016 Trip spans 3 days
Major Airline
Major Airline
IAD
10:35a
ONT
7:28p
8h 53m
1 stop
ONT
1:05p
IAD
8:33p
7h 28m
1 stop
Depart: Sat Sep 24 2016 Return: Fri Sep 30 2016 Trip spans 7 days
American Airlines
American Airlines
DCA
1:39a
ONT
8:57a
7h 18m
1 stop
ONT
8:59p
DCA
6:10a
9h 11m
1 stop
Depart: Mon Oct 3 2016 Return: Sat Oct 8 2016 Trip spans 6 days
Delta
Delta
DCA
12:40p
ONT
9:41p
9h 01m
1 stop
ONT
2:00a
DCA
8:53a
6h 53m
1 stop
Depart: Sat Oct 1 2016 Return: Mon Oct 3 2016 Trip spans 3 days
United
United
IAD
2:00a
ONT
10:58a
8h 58m
1 stop
ONT
4:45p
IAD
11:53p
7h 08m
1 stop
Depart: Wed Sep 28 2016 Return: Sat Oct 1 2016 Trip spans 4 days
American Airlines
American Airlines
IAD
2:35p
ONT
10:08p
7h 33m
1 stop
ONT
8:59p
IAD
4:21a
7h 22m
1 stop
Depart: Fri Jun 3 2016 Return: Tue Jun 7 2016 Trip spans 5 days
Major Airline
Major Airline
DCA
10:59p
ONT
8:35a
9h 36m
1 stop
ONT
4:40a
DCA
10:59a
6h 19m
1 stop
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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

Here's why:

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

We aggregate tons of data for you
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 don'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.

More questions or if you have a bad price to report to us
Please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Washington
only $304
only $284
Destination

Ontario
$284