Find Deals on Flights from Ontario to Washington Dulles Intl (ONT - IAD)

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
Students
under 26
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 Dulles Intl

(Round-trip)
Depart: Tue Jan 31 2017 Return: Thu Feb 2 2017 Trip spans 3 days
Major Airline
Major Airline
ONT
1:00a
IAD
4:47a
27h 47m
2 stops
IAD
9:00a
ONT
10:24a
25h 24m
2 stops
Depart: Sat Feb 4 2017 Return: Tue Feb 7 2017 Trip spans 4 days
American Airlines
American Airlines
ONT
3:25a
IAD
10:06a
6h 41m
1 stop
IAD
10:08a
ONT
6:13p
8h 05m
1 stop
Depart: Wed Feb 8 2017 Return: Thu Feb 9 2017 Trip spans 2 days
United
United
ONT
2:15p
IAD
9:49p
7h 34m
1 stop
IAD
3:15a
ONT
2:33p
11h 18m
1 stop
Depart: Mon Jan 23 2017 Return: Fri Jan 27 2017 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
1:15p
IAD
9:47a
20h 32m
1 stop
IAD
2:00p
ONT
3:24p
25h 24m
1 stop
Depart: Wed Jan 25 2017 Return: Sun Jan 29 2017 Trip spans 5 days
Delta
Delta
ONT
1:35p
IAD
1:36a
12h 01m
2 stops
IAD
1:53a
ONT
9:04p
19h 11m
2 stops
Depart: Thu Feb 23 2017 Return: Mon Feb 27 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
1:00a
IAD
4:47a
27h 47m
1 stop
IAD
9:00a
ONT
2:58a
17h 58m
1 stop
Depart: Sat Jan 28 2017 Return: Mon Jan 30 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
3:25a
IAD
10:06a
6h 41m
1 stop
IAD
10:08a
ONT
6:13p
8h 05m
1 stop
Depart: Mon Feb 6 2017 Return: Wed Feb 8 2017 Trip spans 3 days
United
United
ONT
3:10p
IAD
11:08p
7h 58m
1 stop
IAD
1:27p
ONT
9:59p
8h 32m
1 stop
Depart: Wed Mar 1 2017 Return: Sun Mar 5 2017 Trip spans 5 days
Major Airline
Major Airline
ONT
8:15a
IAD
4:47a
20h 32m
1 stop
IAD
9:00a
ONT
2:58a
17h 58m
1 stop
Depart: Tue Feb 7 2017 Return: Fri Feb 10 2017 Trip spans 4 days
United
United
ONT
5:28a
IAD
12:57p
7h 29m
1 stop
IAD
11:14a
ONT
6:15p
7h 01m
1 stop
Depart: Thu Feb 9 2017 Return: Tue Feb 14 2017 Trip spans 6 days
American Airlines
American Airlines
ONT
3:25a
IAD
10:06a
6h 41m
1 stop
IAD
10:08a
ONT
6:13p
8h 05m
1 stop
Depart: Tue Feb 14 2017 Return: Sat Feb 18 2017 Trip spans 5 days
United
United
ONT
4:10a
IAD
12:57p
8h 47m
1 stop
IAD
12:40p
ONT
9:59p
9h 19m
1 stop
Depart: Sun Jan 29 2017 Return: Sat Feb 25 2017 Trip spans 28 days
United
United
ONT
4:10a
IAD
12:57p
8h 47m
1 stop
IAD
1:30a
ONT
10:45a
9h 15m
1 stop
Depart: Sat Feb 11 2017 Return: Mon Feb 13 2017 Trip spans 3 days
American Airlines
American Airlines
ONT
5:54a
IAD
2:18p
8h 24m
1 stop
IAD
6:29a
ONT
4:12p
9h 43m
1 stop
Depart: Thu Feb 2 2017 Return: Sun Feb 5 2017 Trip spans 4 days
United
United
ONT
8:30a
IAD
2:44p
6h 14m
1 stop
IAD
10:45a
ONT
6:48p
8h 03m
1 stop
Depart: Wed Apr 19 2017 Return: Sat Apr 22 2017 Trip spans 4 days
Alaska Airlines
Alaska Airlines
ONT
1:30p
IAD
9:19a
19h 49m
1 stop
IAD
1:30p
ONT
8:52a
19h 22m
1 stop
Depart: Fri May 5 2017 Return: Tue May 16 2017 Trip spans 12 days
American Airlines
American Airlines
ONT
8:59p
IAD
4:21a
7h 22m
1 stop
IAD
2:35p
ONT
10:08p
7h 33m
1 stop
Depart: Fri Feb 3 2017 Return: Sun Feb 5 2017 Trip spans 3 days
United
United
ONT
4:10a
IAD
11:20a
7h 10m
1 stop
IAD
11:14a
ONT
6:25p
7h 11m
1 stop
Depart: Fri May 26 2017 Return: Wed May 31 2017 Trip spans 6 days
Major Airline
Major Airline
ONT
10:20p
IAD
5:24a
31h 04m
2 stops
IAD
9:30a
ONT
6:25a
20h 55m
2 stops
Depart: Wed Feb 22 2017 Return: Tue Feb 28 2017 Trip spans 7 days
American Airlines
American Airlines
ONT
3:25a
IAD
10:06a
6h 41m
1 stop
IAD
9:54a
ONT
6:13p
8h 19m
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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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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^ The fares displayed in KAYAK ads found on other sites include all taxes and fees for economy class travel and were found by KAYAK users in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
Airports
Origin

Ontario
$274
Destination

Washington
$274