Find Cheap Flights from Ontario to Washington (ONT - WAS)

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 Ontario to Washington

(Round-trip)
Depart: Tue Aug 29 2017 Return: Wed Aug 30 2017 Trip spans 2 days
United
United
ONT
3:40p
IAD
10:45p
7h 05m
1 stop
IAD
4:20a
ONT
3:20p
11h 00m
1 stop
Depart: Wed Aug 23 2017 Return: Wed Aug 30 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
9:10p
DCA
4:00a
6h 50m
1 stop
DCA
1:30a
ONT
9:03a
7h 33m
1 stop
Depart: Sat Sep 16 2017 Return: Tue Sep 19 2017 Trip spans 4 days
Delta
Delta
ONT
2:00a
DCA
8:56a
6h 56m
1 stop
DCA
12:59p
ONT
10:12p
9h 13m
1 stop
Depart: Mon Sep 18 2017 Return: Tue Sep 19 2017 Trip spans 2 days
United
United
ONT
12:40p
IAD
10:27p
9h 47m
1 stop
IAD
5:00a
ONT
3:09p
10h 09m
1 stop
Depart: Mon Aug 28 2017 Return: Wed Aug 30 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
3:35p
DCA
12:14a
8h 39m
1 stop
DCA
3:00a
ONT
10:43a
7h 43m
1 stop
Depart: Tue Sep 19 2017 Return: Wed Sep 20 2017 Trip spans 2 days
United
United
ONT
12:40p
IAD
10:27p
9h 47m
1 stop
IAD
4:20a
ONT
3:09p
10h 49m
1 stop
Depart: Tue Sep 12 2017 Return: Tue Sep 19 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
9:10p
IAD
4:00a
6h 50m
1 stop
IAD
3:05p
ONT
10:10p
7h 05m
1 stop
Depart: Tue Aug 22 2017 Return: Thu Aug 24 2017 Trip spans 3 days
United
United
ONT
4:00a
IAD
12:16p
8h 16m
1 stop
IAD
12:30p
ONT
8:09p
7h 39m
1 stop
Depart: Fri Sep 15 2017 Return: Tue Sep 19 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
9:10p
IAD
4:00a
6h 50m
1 stop
IAD
3:05p
ONT
10:10p
7h 05m
1 stop
Depart: Fri Nov 3 2017 Return: Mon Nov 6 2017 Trip spans 4 days
Delta
Delta
ONT
2:00a
DCA
8:50a
6h 50m
1 stop
DCA
11:45a
ONT
8:44p
8h 59m
1 stop
Depart: Thu Aug 24 2017 Return: Sat Aug 26 2017 Trip spans 3 days
United
United
ONT
5:40p
IAD
12:53a
7h 13m
1 stop
IAD
12:30p
ONT
8:09p
7h 39m
1 stop
Depart: Wed Sep 20 2017 Return: Sat Sep 23 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
3:35p
DCA
12:14a
8h 39m
1 stop
DCA
3:00a
ONT
10:43a
7h 43m
1 stop
Depart: Sat Aug 26 2017 Return: Wed Aug 30 2017 Trip spans 5 days
United
United
ONT
6:44a
DCA
2:02p
7h 18m
1 stop
DCA
12:15p
ONT
7:50p
7h 35m
1 stop
Depart: Fri Sep 22 2017 Return: Tue Sep 26 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
9:10p
DCA
4:00a
6h 50m
1 stop
DCA
3:00a
ONT
10:43a
7h 43m
1 stop
Depart: Wed Aug 30 2017 Return: Sat Sep 2 2017 Trip spans 4 days
United
United
ONT
3:40p
IAD
10:45p
7h 05m
1 stop
IAD
8:30a
ONT
4:30p
8h 00m
1 stop
Depart: Tue Oct 17 2017 Return: Wed Oct 18 2017 Trip spans 2 days
American Airlines
American Airlines
ONT
10:20a
DCA
5:03p
6h 43m
1 stop
DCA
1:25a
ONT
9:03a
7h 38m
1 stop
Depart: Thu Aug 31 2017 Return: Sat Sep 2 2017 Trip spans 3 days
United
United
ONT
4:15p
IAD
12:53a
8h 38m
1 stop
IAD
4:15a
ONT
3:20p
11h 05m
1 stop
Depart: Wed Oct 18 2017 Return: Tue Oct 24 2017 Trip spans 7 days
American Airlines
American Airlines
ONT
10:20a
DCA
5:03p
6h 43m
1 stop
DCA
1:25a
ONT
9:03a
7h 38m
1 stop
Depart: Sat Sep 2 2017 Return: Wed Sep 6 2017 Trip spans 5 days
United
United
ONT
6:44a
DCA
2:02p
7h 18m
1 stop
DCA
12:11p
ONT
7:40p
7h 29m
1 stop
Depart: Wed Oct 25 2017 Return: Wed Nov 1 2017 Trip spans 8 days
American Airlines
American Airlines
ONT
9:10p
IAD
4:00a
6h 50m
1 stop
IAD
3:05p
ONT
10:10p
7h 05m
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.

We compile tonnes 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 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,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$334
Destination

Washington
only $334
only $340