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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: Tue Nov 10 2015 Return: Wed Nov 11 2015 Trip spans 2 days
United
United
ONT
3:45p
IAD
10:53p
7h 08m
1 stop
IAD
4:20a
ONT
12:38p
8h 18m
1 stop
Depart: Wed Sep 9 2015 Return: Mon Sep 14 2015 Trip spans 6 days
Delta
Delta
ONT
2:05a
DCA
8:49a
6h 44m
1 stop
DCA
12:35p
ONT
9:26p
8h 51m
1 stop
Depart: Tue Aug 25 2015 Return: Sat Aug 29 2015 Trip spans 5 days
United
United
ONT
3:05p
IAD
11:29p
8h 24m
1 stop
IAD
8:30a
ONT
5:33p
9h 03m
1 stop
Depart: Wed Aug 26 2015 Return: Sat Aug 29 2015 Trip spans 4 days
United
United
ONT
8:30a
IAD
6:02p
9h 32m
1 stop
IAD
12:50p
ONT
10:59p
10h 09m
1 stop
Depart: Mon Aug 31 2015 Return: Tue Sep 8 2015 Trip spans 9 days
United
United
ONT
1:20p
IAD
11:29p
10h 09m
1 stop
IAD
3:00a
ONT
1:38p
10h 38m
1 stop
Depart: Tue Sep 1 2015 Return: Sun Sep 6 2015 Trip spans 6 days
United
United
ONT
9:15a
IAD
3:48p
6h 33m
1 stop
IAD
4:25a
ONT
11:38a
7h 13m
1 stop
Depart: Wed Sep 2 2015 Return: Sun Sep 6 2015 Trip spans 5 days
United
United
ONT
9:15a
IAD
3:48p
6h 33m
1 stop
IAD
4:25a
ONT
11:38a
7h 13m
1 stop
Depart: Thu Sep 10 2015 Return: Mon Sep 14 2015 Trip spans 5 days
Delta
Delta
ONT
6:20a
DCA
3:59p
9h 39m
1 stop
DCA
12:35p
ONT
9:26p
8h 51m
1 stop
Depart: Tue Oct 20 2015 Return: Sat Oct 24 2015 Trip spans 5 days
United
United
ONT
1:20a
IAD
10:54a
9h 34m
1 stop
IAD
12:50p
ONT
10:59p
10h 09m
1 stop
Depart: Wed Oct 21 2015 Return: Sat Oct 24 2015 Trip spans 4 days
United
United
ONT
1:20a
IAD
10:54a
9h 34m
1 stop
IAD
12:50p
ONT
10:59p
10h 09m
1 stop
Depart: Sat Oct 24 2015 Return: Wed Oct 28 2015 Trip spans 5 days
United
United
ONT
1:20p
IAD
11:29p
10h 09m
1 stop
IAD
1:45a
ONT
9:55a
8h 10m
1 stop
Depart: Wed Sep 16 2015 Return: Mon Sep 21 2015 Trip spans 6 days
Delta
Delta
ONT
2:05a
DCA
8:49a
6h 44m
1 stop
DCA
12:35p
ONT
9:26p
8h 51m
1 stop
Depart: Thu Jul 30 2015 Return: Wed Aug 12 2015 Trip spans 14 days
United
United
ONT
9:59a
IAD
7:08p
9h 09m
1 stop
IAD
2:00a
ONT
12:29p
10h 29m
1 stop
Depart: Tue Aug 11 2015 Return: Sun Aug 16 2015 Trip spans 6 days
United
United
ONT
3:14p
IAD
12:54a
9h 40m
1 stop
IAD
2:45a
ONT
12:29p
9h 44m
1 stop
Depart: Wed Aug 12 2015 Return: Sun Aug 16 2015 Trip spans 5 days
United
United
ONT
9:59a
IAD
7:08p
9h 09m
1 stop
IAD
2:45a
ONT
12:29p
9h 44m
1 stop
Depart: Tue Sep 15 2015 Return: Tue Sep 29 2015 Trip spans 15 days
United
United
ONT
7:33a
DCA
2:54p
7h 21m
1 stop
DCA
1:45a
ONT
9:55a
8h 10m
1 stop
Depart: Sun Sep 6 2015 Return: Wed Sep 9 2015 Trip spans 4 days
US Airways
US Airways
ONT
2:28a
DCA
9:15a
6h 47m
1 stop
DCA
1:20p
ONT
8:05p
6h 45m
1 stop
Depart: Tue Sep 8 2015 Return: Wed Sep 9 2015 Trip spans 2 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: Sun Nov 22 2015 Return: Fri Nov 27 2015 Trip spans 6 days
American Airlines
American Airlines
ONT
2:30p
DCA
12:41a
10h 11m
2 stops
DCA
2:00a
ONT
9:31a
7h 31m
1 stop
Depart: Sun Jun 21 2015 Return: Sat Jul 4 2015 Trip spans 14 days
US Airways
US Airways
ONT
8:59p
IAD
4:18a
7h 19m
1 stop
IAD
8:05a
ONT
5:08p
9h 03m
1 stop
Airports
Origin

Ontario
$372
Destination

Washington
only $372
only $377