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

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

Book cheap flights from Ontario to Washington Dulles Intl

(Round-trip)
Depart: Tue May 5 2015 Return: Wed May 6 2015 Trip spans 2 days
United
United
ONT
1:53p
IAD
11:55p
10h 02m
1 stop
IAD
5:10a
ONT
3:10p
10h 00m
1 stop
Depart: Mon May 11 2015 Return: Tue May 12 2015 Trip spans 2 days
United
United
ONT
3:17p
IAD
12:18a
9h 01m
1 stop
IAD
5:10a
ONT
4:20p
11h 10m
1 stop
Depart: Wed May 6 2015 Return: Sat May 9 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
2:10p
ONT
10:20p
8h 10m
1 stop
Depart: Sat May 16 2015 Return: Tue May 19 2015 Trip spans 4 days
US Airways
US Airways
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Sat May 9 2015 Return: Tue May 12 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Tue May 12 2015 Return: Sat May 16 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Wed May 13 2015 Return: Sat May 16 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Tue May 19 2015 Return: Wed May 20 2015 Trip spans 2 days
United
United
ONT
8:47a
IAD
6:58p
10h 11m
1 stop
IAD
2:10a
ONT
11:17a
9h 07m
1 stop
Depart: Wed May 20 2015 Return: Tue May 26 2015 Trip spans 7 days
United
United
ONT
9:24a
IAD
6:28p
9h 04m
1 stop
IAD
1:45a
ONT
10:00a
8h 15m
1 stop
Depart: Sat May 23 2015 Return: Wed May 27 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Tue May 26 2015 Return: Sat May 30 2015 Trip spans 5 days
United
United
ONT
9:24a
IAD
6:28p
9h 04m
1 stop
IAD
2:45p
ONT
11:10p
8h 25m
1 stop
Depart: Wed May 27 2015 Return: Sat May 30 2015 Trip spans 4 days
US Airways
US Airways
ONT
10:20a
IAD
5:28p
7h 08m
1 stop
IAD
1:30a
ONT
9:05a
7h 35m
1 stop
Depart: Tue Sep 22 2015 Return: Wed Sep 30 2015 Trip spans 9 days
United
United
ONT
9:15a
IAD
4:13p
6h 58m
1 stop
IAD
3:00a
ONT
10:58a
7h 58m
1 stop
Depart: Tue Oct 13 2015 Return: Sat Oct 17 2015 Trip spans 5 days
United
United
ONT
9:15a
IAD
4:13p
6h 58m
1 stop
IAD
12:50p
ONT
10:59p
10h 09m
1 stop
Depart: Wed Oct 14 2015 Return: Sat Oct 24 2015 Trip spans 11 days
United
United
ONT
1:20a
IAD
10:54a
9h 34m
1 stop
IAD
2:00a
ONT
10:58a
8h 58m
1 stop
Depart: Sun May 10 2015 Return: Tue May 12 2015 Trip spans 3 days
United
United
ONT
3:17p
IAD
11:36p
8h 19m
1 stop
IAD
5:10a
ONT
4:20p
11h 10m
1 stop
Depart: Mon May 18 2015 Return: Tue May 26 2015 Trip spans 9 days
United
United
ONT
4:39p
IAD
12:18a
7h 39m
1 stop
IAD
1:45a
ONT
10:00a
8h 15m
1 stop
Depart: Thu May 21 2015 Return: Tue May 26 2015 Trip spans 6 days
United
United
ONT
8:47a
IAD
5:15p
8h 28m
1 stop
IAD
1:45a
ONT
10:00a
8h 15m
1 stop
Depart: Thu May 28 2015 Return: Sun May 31 2015 Trip spans 4 days
United
United
ONT
1:30a
IAD
11:00a
9h 30m
1 stop
IAD
2:07a
ONT
11:17a
9h 10m
1 stop
Depart: Fri Oct 23 2015 Return: Wed Oct 28 2015 Trip spans 6 days
Delta
Delta
ONT
4:55p
IAD
5:29a
12h 34m
2 stops
IAD
5:40a
ONT
7:41p
14h 01m
2 stops
Airports
Origin

Ontario
$372
Destination

Washington
$372