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.
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Book cheap flights from Ontario to Washington

(Round-trip)
Depart: Thu Dec 7 2017 Return: Sun Dec 10 2017 Trip spans 4 days
Frontier
Frontier
ONT
12:00a
DCA
2:20p
14h 20m
1 stop
DCA
12:00a
ONT
7:07p
19h 07m
1 stop
Depart: Mon Dec 11 2017 Return: Mon Dec 18 2017 Trip spans 8 days
Multiple Airlines
Multiple Airlines
ONT
12:00a
IAD
3:57a
51h 57m
3 stops
IAD
12:00a
ONT
10:35p
22h 35m
2 stops
Depart: Thu Jan 11 2018 Return: Tue Jan 16 2018 Trip spans 6 days
Frontier
Frontier
ONT
12:00a
DCA
2:14p
14h 14m
1 stop
DCA
12:00a
ONT
8:11a
8h 11m
1 stop
Depart: Tue Jan 16 2018 Return: Thu Jan 18 2018 Trip spans 3 days
Frontier
Frontier
ONT
12:00a
DCA
6:45p
18h 45m
1 stop
DCA
12:00a
ONT
8:11a
8h 11m
1 stop
Depart: Tue Feb 6 2018 Return: Fri Feb 9 2018 Trip spans 4 days
Frontier
Frontier
ONT
12:00a
DCA
2:14p
14h 14m
1 stop
DCA
12:00a
ONT
11:12p
23h 12m
1 stop
Depart: Tue Jan 9 2018 Return: Sun Jan 14 2018 Trip spans 6 days
Multiple Airlines
Multiple Airlines
ONT
12:00a
IAD
6:42a
6h 42m
1 stop
IAD
12:00a
ONT
8:05a
8h 05m
1 stop
Depart: Sat Mar 3 2018 Return: Sat Mar 10 2018 Trip spans 8 days
Multiple Airlines
Multiple Airlines
ONT
12:00a
IAD
6:39a
6h 39m
1 stop
IAD
12:00a
ONT
7:40a
7h 40m
1 stop
Depart: Thu Nov 30 2017 Return: Mon Dec 4 2017 Trip spans 5 days
Frontier
Frontier
ONT
12:00a
IAD
6:33a
6h 33m
1 stop
IAD
12:00a
ONT
7:55a
7h 55m
1 stop
Depart: Thu Nov 30 2017 Return: Mon Dec 4 2017 Trip spans 5 days
Frontier
Frontier
ONT
12:00a
IAD
6:33a
6h 33m
1 stop
IAD
12:00a
ONT
7:55a
7h 55m
1 stop
Depart: Fri Dec 1 2017 Return: Sat Dec 2 2017 Trip spans 2 days
Frontier
Frontier
ONT
12:00a
IAD
6:40a
6h 40m
1 stop
IAD
12:00a
ONT
7:55a
7h 55m
1 stop
Depart: Thu Nov 30 2017 Return: Thu Dec 7 2017 Trip spans 8 days
Multiple Airlines
Multiple Airlines
ONT
12:00a
IAD
6:33a
6h 33m
1 stop
IAD
12:00a
ONT
7:13a
7h 13m
1 stop
Depart: Tue Dec 5 2017 Return: Sat Dec 9 2017 Trip spans 5 days
Frontier
Frontier
ONT
12:00a
IAD
6:33a
6h 33m
1 stop
IAD
12:00a
ONT
7:55a
7h 55m
1 stop
Depart: Thu Dec 7 2017 Return: Sun Dec 10 2017 Trip spans 4 days
Frontier
Frontier
ONT
12:00a
IAD
6:33a
6h 33m
1 stop
IAD
12:00a
ONT
8:00a
8h 00m
1 stop
Depart: Tue Jan 9 2018 Return: Wed Jan 17 2018 Trip spans 9 days
Frontier
Frontier
ONT
12:00a
IAD
6:46a
6h 46m
1 stop
IAD
12:00a
ONT
8:11a
8h 11m
1 stop
Depart: Wed Jan 31 2018 Return: Tue Feb 13 2018 Trip spans 14 days
Frontier
Frontier
ONT
12:00a
IAD
6:50a
6h 50m
1 stop
IAD
12:00a
ONT
8:05a
8h 05m
1 stop
Depart: Tue Dec 19 2017 Return: Mon Dec 25 2017 Trip spans 7 days
Multiple Airlines
Multiple Airlines
ONT
12:00a
DCA
6:41a
6h 41m
1 stop
DCA
12:00a
ONT
9:20a
9h 20m
1 stop
Depart: Fri Feb 9 2018 Return: Sun Feb 11 2018 Trip spans 3 days
Frontier
Frontier
ONT
12:00a
IAD
6:50a
6h 50m
1 stop
IAD
12:00a
ONT
8:05a
8h 05m
1 stop
Depart: Wed Feb 14 2018 Return: Mon Feb 19 2018 Trip spans 6 days
Frontier
Frontier
ONT
12:00a
IAD
6:50a
6h 50m
1 stop
IAD
12:00a
ONT
8:11a
8h 11m
1 stop
Depart: Thu Nov 30 2017 Return: Tue Dec 5 2017 Trip spans 6 days
Frontier
Frontier
ONT
12:00a
DCA
6:59p
18h 59m
1 stop
DCA
12:00a
ONT
8:04a
8h 04m
1 stop
Depart: Sat Mar 3 2018 Return: Sat Mar 10 2018 Trip spans 8 days
Frontier
Frontier
ONT
12:00a
IAD
6:50a
6h 50m
1 stop
IAD
12:00a
ONT
7:40a
7h 40m
1 stop
* 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
$202
Destination

Washington
only $229
only $202
Airlines