Find Deals on 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.
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Book cheap flights from Ontario to Washington

(Round-trip)
Depart: Tue Mar 14 2017 Return: Mon Mar 20 2017 Trip spans 7 days
Major Airline
Major Airline
ONT
9:30a
IAD
5:15a
19h 45m
1 stop
IAD
9:30a
ONT
4:52a
19h 22m
1 stop
Depart: Tue Apr 11 2017 Return: Wed Apr 12 2017 Trip spans 2 days
United
United
ONT
3:15p
IAD
11:17p
8h 02m
1 stop
IAD
4:53a
ONT
3:21p
10h 28m
1 stop
Depart: Mon Apr 3 2017 Return: Tue Apr 11 2017 Trip spans 9 days
American Airlines
American Airlines
ONT
9:15p
DCA
3:52a
6h 37m
1 stop
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
Depart: Mon Apr 10 2017 Return: Tue Apr 25 2017 Trip spans 16 days
Major Airline
Major Airline
ONT
10:20p
DCA
10:55a
12h 35m
1 stop
DCA
12:00a
ONT
11:27a
11h 27m
1 stop
Depart: Fri Apr 21 2017 Return: Sat Apr 22 2017 Trip spans 2 days
United
United
ONT
3:15p
IAD
10:37p
7h 22m
1 stop
IAD
4:15a
ONT
3:21p
11h 06m
1 stop
Depart: Wed May 3 2017 Return: Sat May 6 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
10:30a
DCA
5:09p
6h 39m
1 stop
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
Depart: Mon May 15 2017 Return: Wed May 31 2017 Trip spans 17 days
Major Airline
Major Airline
ONT
10:20p
DCA
10:56a
12h 36m
2 stops
DCA
9:18a
ONT
5:25a
20h 07m
2 stops
Depart: Wed Jul 19 2017 Return: Wed Jul 26 2017 Trip spans 8 days
Delta
Delta
ONT
2:00a
DCA
8:50a
6h 50m
1 stop
DCA
12:45p
ONT
9:39p
8h 54m
1 stop
Depart: Thu Mar 16 2017 Return: Sat Mar 18 2017 Trip spans 3 days
United
United
ONT
8:30a
IAD
5:57p
9h 27m
1 stop
IAD
1:20p
ONT
11:06p
9h 46m
1 stop
Depart: Sat May 13 2017 Return: Wed May 17 2017 Trip spans 5 days
American Airlines
American Airlines
ONT
6:55a
DCA
3:52p
8h 57m
1 stop
DCA
2:59a
ONT
12:38p
9h 39m
1 stop
Depart: Wed Apr 12 2017 Return: Thu Apr 20 2017 Trip spans 9 days
Major Airline
Major Airline
ONT
9:30a
IAD
5:19a
19h 49m
2 stops
IAD
9:30a
ONT
5:38p
32h 08m
2 stops
Depart: Fri Mar 17 2017 Return: Sat Mar 18 2017 Trip spans 2 days
United
United
ONT
8:30a
IAD
6:01p
9h 31m
1 stop
IAD
12:45p
ONT
11:06p
10h 21m
1 stop
Depart: Mon May 1 2017 Return: Fri May 5 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
3:00a
DCA
6:49a
27h 49m
2 stops
DCA
9:08a
ONT
5:23a
20h 15m
2 stops
Depart: Mon Mar 27 2017 Return: Tue Apr 4 2017 Trip spans 9 days
American Airlines
American Airlines
ONT
9:15p
DCA
3:45a
6h 30m
1 stop
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
Depart: Mon Mar 20 2017 Return: Tue Mar 28 2017 Trip spans 9 days
United
United
ONT
6:45a
DCA
3:53p
9h 08m
1 stop
DCA
4:30a
ONT
3:21p
10h 51m
1 stop
Depart: Wed Mar 15 2017 Return: Thu Mar 16 2017 Trip spans 2 days
Major Airline
Major Airline
ONT
2:00a
DCA
3:31a
1h 31m
nonstop
DCA
2:00a
ONT
9:31a
7h 31m
nonstop
Depart: Tue Mar 21 2017 Return: Mon Mar 27 2017 Trip spans 7 days
United
United
ONT
9:30a
IAD
3:52p
6h 22m
1 stop
IAD
12:15p
ONT
11:06p
10h 51m
1 stop
Depart: Mon Apr 24 2017 Return: Sun Apr 30 2017 Trip spans 7 days
American Airlines
American Airlines
ONT
9:15p
DCA
3:52a
6h 37m
1 stop
DCA
3:00a
ONT
10:41a
7h 41m
1 stop
Depart: Wed Mar 22 2017 Return: Tue Mar 28 2017 Trip spans 7 days
United
United
ONT
8:30a
DCA
3:56p
7h 26m
1 stop
DCA
4:30a
ONT
3:21p
10h 51m
1 stop
Depart: Wed Mar 29 2017 Return: Wed Apr 5 2017 Trip spans 8 days
Major Airline
Major Airline
ONT
9:30a
DCA
10:33a
25h 03m
2 stops
DCA
12:00a
ONT
5:21p
17h 21m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

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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.

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Airports
Origin

Ontario
$289
Destination

Washington
only $289
only $294