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

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

Book cheap flights from Washington Dulles Intl to Ontario

(Round-trip)
Depart: Wed Sep 9 2015 Return: Thu Sep 10 2015 Trip spans 2 days
United
United
IAD
12:03p
ONT
7:14p
7h 11m
1 stop
ONT
9:28a
IAD
3:51p
6h 23m
1 stop
Depart: Thu Sep 10 2015 Return: Fri Sep 11 2015 Trip spans 2 days
United
United
IAD
12:03p
ONT
7:14p
7h 11m
1 stop
ONT
9:28a
IAD
3:51p
6h 23m
1 stop
Depart: Fri Sep 11 2015 Return: Sun Sep 13 2015 Trip spans 3 days
United
United
IAD
11:40a
ONT
7:37p
7h 57m
1 stop
ONT
5:07p
IAD
12:25a
7h 18m
1 stop
Depart: Sat Sep 12 2015 Return: Sun Sep 13 2015 Trip spans 2 days
United
United
IAD
2:47a
ONT
11:12a
8h 25m
1 stop
ONT
5:07p
IAD
12:25a
7h 18m
1 stop
Depart: Sun Sep 13 2015 Return: Mon Sep 14 2015 Trip spans 2 days
United
United
IAD
5:08a
ONT
4:27p
11h 19m
1 stop
ONT
3:01p
IAD
12:25a
9h 24m
1 stop
Depart: Wed Sep 16 2015 Return: Fri Sep 18 2015 Trip spans 3 days
United
United
IAD
6:44a
ONT
4:27p
9h 43m
1 stop
ONT
2:00p
IAD
12:25a
10h 25m
1 stop
Depart: Fri Sep 18 2015 Return: Mon Sep 21 2015 Trip spans 4 days
United
United
IAD
11:40a
ONT
7:37p
7h 57m
1 stop
ONT
2:00p
IAD
11:41p
9h 41m
1 stop
Depart: Sat Sep 19 2015 Return: Tue Sep 22 2015 Trip spans 4 days
United
United
IAD
1:08p
ONT
9:32p
8h 24m
1 stop
ONT
9:28a
IAD
3:51p
6h 23m
1 stop
Depart: Mon Sep 21 2015 Return: Wed Sep 23 2015 Trip spans 3 days
United
United
IAD
11:40a
ONT
7:37p
7h 57m
1 stop
ONT
3:01p
IAD
12:23a
9h 22m
1 stop
Depart: Tue Sep 22 2015 Return: Tue Sep 29 2015 Trip spans 8 days
United
United
IAD
12:03p
ONT
7:14p
7h 11m
1 stop
ONT
9:21a
IAD
4:03p
6h 42m
1 stop
Depart: Wed Sep 23 2015 Return: Mon Sep 28 2015 Trip spans 6 days
United
United
IAD
11:40a
ONT
7:37p
7h 57m
1 stop
ONT
4:57p
IAD
12:25a
7h 28m
1 stop
Depart: Thu Sep 24 2015 Return: Sun Sep 27 2015 Trip spans 4 days
United
United
IAD
11:09a
ONT
7:27p
8h 18m
1 stop
ONT
2:57p
IAD
12:25a
9h 28m
1 stop
Depart: Fri Sep 25 2015 Return: Sun Sep 27 2015 Trip spans 3 days
United
United
IAD
12:48p
ONT
11:29p
10h 41m
1 stop
ONT
3:00p
IAD
12:23a
9h 23m
1 stop
Depart: Sat Sep 26 2015 Return: Sun Sep 27 2015 Trip spans 2 days
United
United
IAD
8:39a
ONT
5:30p
8h 51m
1 stop
ONT
3:00p
IAD
12:23a
9h 23m
1 stop
Depart: Mon Sep 28 2015 Return: Sat Oct 3 2015 Trip spans 6 days
United
United
IAD
12:48p
ONT
11:29p
10h 41m
1 stop
ONT
3:00p
IAD
12:25a
9h 25m
1 stop
Depart: Fri Oct 2 2015 Return: Mon Oct 5 2015 Trip spans 4 days
United
United
IAD
12:48p
ONT
11:29p
10h 41m
1 stop
ONT
4:57p
IAD
12:25a
7h 28m
1 stop
Depart: Tue Aug 25 2015 Return: Sat Aug 29 2015 Trip spans 5 days
American Airlines
American Airlines
IAD
2:42p
ONT
9:58p
7h 16m
1 stop
ONT
3:35a
IAD
10:52a
7h 17m
1 stop
Depart: Sat Aug 8 2015 Return: Tue Aug 11 2015 Trip spans 4 days
US Airways
US Airways
IAD
2:42p
ONT
10:14p
7h 32m
1 stop
ONT
10:15a
IAD
5:26p
7h 11m
1 stop
Depart: Sat Oct 17 2015 Return: Wed Oct 21 2015 Trip spans 5 days
Delta
Delta
IAD
9:55a
ONT
8:06p
10h 11m
2 stops
ONT
2:00a
IAD
4:04p
14h 04m
2 stops
Depart: Mon Dec 21 2015 Return: Tue Dec 29 2015 Trip spans 9 days
Alaska Airlines
Alaska Airlines
IAD
1:50p
ONT
8:10a
18h 20m
1 stop
ONT
1:00a
IAD
9:50a
8h 50m
1 stop
Airports
Origin

Washington
$325
Destination

Ontario
$325