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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: Sat Apr 25 2015 Return: Tue Apr 28 2015 Trip spans 4 days
United
United
ONT
2:00a
IAD
8:53a
6h 53m
1 stop
IAD
1:45a
ONT
9:20a
7h 35m
1 stop
Depart: Fri Apr 24 2015 Return: Tue Apr 28 2015 Trip spans 5 days
United
United
ONT
3:18p
IAD
12:25a
9h 07m
1 stop
IAD
1:45a
ONT
9:20a
7h 35m
1 stop
Depart: Thu Apr 30 2015 Return: Tue May 5 2015 Trip spans 6 days
United
United
ONT
10:06a
IAD
6:47p
8h 41m
1 stop
IAD
8:35a
ONT
6:07p
9h 32m
1 stop
Depart: Mon May 4 2015 Return: Sun May 10 2015 Trip spans 7 days
United
United
ONT
1:53p
IAD
12:22a
10h 29m
1 stop
IAD
1:45a
ONT
10:10a
8h 25m
1 stop
Depart: Thu May 7 2015 Return: Sun May 10 2015 Trip spans 4 days
United
United
ONT
8:47a
IAD
6:58p
10h 11m
1 stop
IAD
1:45a
ONT
10:10a
8h 25m
1 stop
Depart: Fri May 8 2015 Return: Sun May 10 2015 Trip spans 3 days
United
United
ONT
3:17p
IAD
10:44p
7h 27m
1 stop
IAD
1:45a
ONT
10:10a
8h 25m
1 stop
Depart: Sat May 9 2015 Return: Tue May 19 2015 Trip spans 11 days
American Airlines
American Airlines
ONT
10:15a
IAD
5:09p
6h 54m
1 stop
IAD
1:50a
ONT
8:57a
7h 07m
1 stop
Depart: Fri Apr 17 2015 Return: Wed Apr 22 2015 Trip spans 6 days
United
United
ONT
10:06a
IAD
6:47p
8h 41m
1 stop
IAD
2:00a
ONT
12:36p
10h 36m
1 stop
Depart: Mon Apr 20 2015 Return: Sat May 2 2015 Trip spans 13 days
United
United
ONT
3:18p
IAD
12:22a
9h 04m
1 stop
IAD
1:34p
ONT
11:09p
9h 35m
1 stop
Depart: Wed Apr 22 2015 Return: Mon Apr 27 2015 Trip spans 6 days
United
United
ONT
3:18p
IAD
11:43p
8h 25m
1 stop
IAD
7:26a
ONT
4:23p
8h 57m
1 stop
Depart: Thu Apr 23 2015 Return: Mon Apr 27 2015 Trip spans 5 days
United
United
ONT
10:06a
IAD
6:47p
8h 41m
1 stop
IAD
10:16a
ONT
7:09p
8h 53m
1 stop
Depart: Tue May 5 2015 Return: Tue May 12 2015 Trip spans 8 days
United
United
ONT
6:45a
IAD
2:12p
7h 27m
1 stop
IAD
7:29a
ONT
4:20p
8h 51m
1 stop
Depart: Mon May 11 2015 Return: Tue May 19 2015 Trip spans 9 days
American Airlines
American Airlines
ONT
8:59p
IAD
4:21a
7h 22m
1 stop
IAD
1:50a
ONT
8:57a
7h 07m
1 stop
Depart: Wed May 13 2015 Return: Sun May 17 2015 Trip spans 5 days
United
United
ONT
6:43a
IAD
5:15p
10h 32m
1 stop
IAD
2:07a
ONT
11:17a
9h 10m
1 stop
Depart: Wed May 20 2015 Return: Sat May 23 2015 Trip spans 4 days
United
United
ONT
8:47a
IAD
5:15p
8h 28m
1 stop
IAD
2:39p
ONT
11:10p
8h 31m
1 stop
Depart: Tue May 26 2015 Return: Thu Jun 4 2015 Trip spans 10 days
United
United
ONT
8:47a
IAD
6:58p
10h 11m
1 stop
IAD
2:00a
ONT
10:58a
8h 58m
1 stop
Depart: Wed May 27 2015 Return: Sun May 31 2015 Trip spans 5 days
United
United
ONT
9:24a
IAD
4:11p
6h 47m
1 stop
IAD
2:07a
ONT
11:17a
9h 10m
1 stop
Depart: Thu May 28 2015 Return: Tue Jun 2 2015 Trip spans 6 days
United
United
ONT
8:47a
IAD
5:15p
8h 28m
1 stop
IAD
7:29a
ONT
5:47p
10h 18m
1 stop
Depart: Fri May 29 2015 Return: Sun May 31 2015 Trip spans 3 days
United
United
ONT
8:47a
IAD
6:58p
10h 11m
1 stop
IAD
2:07a
ONT
11:17a
9h 10m
1 stop
Depart: Fri Mar 27 2015 Return: Tue Mar 31 2015 Trip spans 5 days
US Airways
US Airways
ONT
3:15a
IAD
11:46a
8h 31m
1 stop
IAD
1:30a
ONT
9:07a
7h 37m
1 stop
Change your search
Airports
Origin

Ontario
$308
Destination

Washington
$308