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Find Deals on Flights from Ontario to Washington (ONT - WAS)

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

Book cheap flights from Ontario to Washington

(Round-trip)
Depart: Mon Sep 21 2015 Return: Tue Sep 22 2015 Trip spans 2 days
United
United
ONT
1:05p
IAD
11:41p
10h 36m
1 stop
IAD
5:02a
ONT
3:32p
10h 30m
1 stop
Depart: Wed Sep 9 2015 Return: Wed Sep 16 2015 Trip spans 8 days
Delta
Delta
ONT
2:15a
DCA
8:57a
6h 42m
1 stop
DCA
12:47p
ONT
9:31p
8h 44m
1 stop
Depart: Fri Sep 11 2015 Return: Tue Sep 15 2015 Trip spans 5 days
United
United
ONT
7:33a
DCA
4:15p
8h 42m
1 stop
DCA
1:47p
ONT
9:32p
7h 45m
1 stop
Depart: Tue Sep 8 2015 Return: Sat Sep 12 2015 Trip spans 5 days
United
United
ONT
8:44a
IAD
6:52p
10h 08m
1 stop
IAD
1:08p
ONT
9:32p
8h 24m
1 stop
Depart: Thu Sep 10 2015 Return: Fri Sep 11 2015 Trip spans 2 days
United
United
ONT
9:28a
IAD
3:51p
6h 23m
1 stop
IAD
12:03p
ONT
7:14p
7h 11m
1 stop
Depart: Sat Sep 12 2015 Return: Sat Sep 26 2015 Trip spans 15 days
United
United
ONT
1:00a
IAD
8:28a
7h 28m
1 stop
IAD
8:39a
ONT
5:30p
8h 51m
1 stop
Depart: Wed Sep 16 2015 Return: Mon Sep 21 2015 Trip spans 6 days
United
United
ONT
2:00p
IAD
12:25a
10h 25m
1 stop
IAD
6:44a
ONT
4:27p
9h 43m
1 stop
Depart: Thu Sep 17 2015 Return: Wed Sep 23 2015 Trip spans 7 days
United
United
ONT
4:46a
DCA
3:26p
10h 40m
1 stop
DCA
11:29a
ONT
9:32p
10h 03m
1 stop
Depart: Sat Sep 19 2015 Return: Wed Sep 23 2015 Trip spans 5 days
United
United
ONT
4:46a
IAD
12:02p
7h 16m
1 stop
IAD
12:03p
ONT
7:14p
7h 11m
1 stop
Depart: Tue Sep 22 2015 Return: Sun Sep 27 2015 Trip spans 6 days
United
United
ONT
6:24a
DCA
3:26p
9h 02m
1 stop
DCA
1:45a
ONT
9:43a
7h 58m
1 stop
Depart: Wed Sep 23 2015 Return: Mon Sep 28 2015 Trip spans 6 days
United
United
ONT
5:07p
IAD
12:23a
7h 16m
1 stop
IAD
2:58p
ONT
11:29p
8h 31m
1 stop
Depart: Thu Sep 24 2015 Return: Sun Sep 27 2015 Trip spans 4 days
United
United
ONT
4:46a
DCA
3:34p
10h 48m
1 stop
DCA
1:45a
ONT
9:43a
7h 58m
1 stop
Depart: Fri Sep 25 2015 Return: Mon Sep 28 2015 Trip spans 4 days
United
United
ONT
3:00p
IAD
11:39p
8h 39m
1 stop
IAD
2:58p
ONT
11:29p
8h 31m
1 stop
Depart: Tue Sep 29 2015 Return: Tue Oct 6 2015 Trip spans 8 days
United
United
ONT
9:21a
IAD
4:03p
6h 42m
1 stop
IAD
11:53a
ONT
7:07p
7h 14m
1 stop
Depart: Thu Oct 1 2015 Return: Mon Oct 5 2015 Trip spans 5 days
Delta
Delta
ONT
2:15a
DCA
8:46a
6h 31m
1 stop
DCA
12:40p
ONT
9:31p
8h 51m
1 stop
Depart: Wed Aug 26 2015 Return: Wed Sep 2 2015 Trip spans 8 days
American Airlines
American Airlines
ONT
3:25p
IAD
4:18a
12h 53m
2 stops
IAD
2:42p
ONT
9:58p
7h 16m
1 stop
Depart: Mon Aug 31 2015 Return: Sat Sep 12 2015 Trip spans 13 days
US Airways
US Airways
ONT
8:35a
DCA
2:59p
6h 24m
1 stop
DCA
3:00a
ONT
10:33a
7h 33m
1 stop
Depart: Wed Sep 30 2015 Return: Sat Oct 3 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
8:35a
DCA
2:58p
6h 23m
1 stop
DCA
3:00a
ONT
10:33a
7h 33m
1 stop
Depart: Fri Dec 25 2015 Return: Tue Dec 29 2015 Trip spans 5 days
Alaska Airlines
Alaska Airlines
ONT
4:30a
DCA
1:59p
9h 29m
2 stops
DCA
3:00a
ONT
3:07p
12h 07m
1 stop
Depart: Mon Aug 17 2015 Return: Sat Aug 22 2015 Trip spans 6 days
Delta
Delta
ONT
6:15a
IAD
3:55p
9h 40m
2 stops
IAD
11:30a
ONT
9:41p
10h 11m
2 stops
Airports
Origin

Ontario
$320
Destination

Washington
only $320
only $325