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

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youth
12-17
Child
2-11
Seat Infant
under 2
Lap Infant
under 2
The price shown for each flight will be the average for all passengers including any infants.
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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 Oct 6 2015 Return: Tue Oct 20 2015 Trip spans 15 days
Delta
Delta
ONT
2:23p
IAD
2:59a
12h 36m
2 stops
IAD
9:00a
ONT
9:34p
12h 34m
2 stops
Depart: Tue Oct 13 2015 Return: Tue Oct 27 2015 Trip spans 15 days
United
United
ONT
3:00p
IAD
4:28a
13h 28m
2 stops
IAD
4:21a
ONT
4:30p
12h 09m
2 stops
Depart: Tue Sep 22 2015 Return: Wed Sep 23 2015 Trip spans 2 days
United
United
ONT
1:05p
IAD
11:41p
10h 36m
1 stop
IAD
5:08a
ONT
4:27p
11h 19m
1 stop
Depart: Wed Sep 23 2015 Return: Thu Sep 24 2015 Trip spans 2 days
United
United
ONT
3:01p
IAD
11:41p
8h 40m
1 stop
IAD
6:00a
ONT
4:31p
10h 31m
1 stop
Depart: Tue Nov 10 2015 Return: Wed Nov 11 2015 Trip spans 2 days
United
United
ONT
1:00p
IAD
10:34p
9h 34m
1 stop
IAD
5:00a
ONT
3:30p
10h 30m
1 stop
Depart: Sat Sep 26 2015 Return: Wed Sep 30 2015 Trip spans 5 days
American Airlines
American Airlines
ONT
6:57a
IAD
3:34p
8h 37m
1 stop
IAD
2:40p
ONT
10:04p
7h 24m
1 stop
Depart: Thu Sep 24 2015 Return: Mon Sep 28 2015 Trip spans 5 days
United
United
ONT
1:05a
IAD
11:02a
9h 57m
1 stop
IAD
3:07p
ONT
11:29p
8h 22m
1 stop
Depart: Fri Sep 25 2015 Return: Mon Sep 28 2015 Trip spans 4 days
United
United
ONT
8:39a
IAD
5:26p
8h 47m
1 stop
IAD
2:35a
ONT
11:09a
8h 34m
1 stop
Depart: Mon Sep 28 2015 Return: Mon Oct 5 2015 Trip spans 8 days
United
United
ONT
2:01p
IAD
11:39p
9h 38m
1 stop
IAD
11:09a
ONT
7:27p
8h 18m
1 stop
Depart: Tue Sep 29 2015 Return: Mon Oct 5 2015 Trip spans 7 days
United
United
ONT
8:39a
IAD
5:24p
8h 45m
1 stop
IAD
12:45p
ONT
11:29p
10h 44m
1 stop
Depart: Wed Sep 30 2015 Return: Sat Oct 3 2015 Trip spans 4 days
United
United
ONT
1:05a
IAD
8:28a
7h 23m
1 stop
IAD
1:20p
ONT
11:29p
10h 09m
1 stop
Depart: Thu Oct 1 2015 Return: Mon Oct 5 2015 Trip spans 5 days
United
United
ONT
1:05a
IAD
8:28a
7h 23m
1 stop
IAD
12:45p
ONT
11:29p
10h 44m
1 stop
Depart: Fri Oct 2 2015 Return: Sat Oct 3 2015 Trip spans 2 days
United
United
ONT
1:05a
IAD
8:28a
7h 23m
1 stop
IAD
2:38a
ONT
11:09a
8h 31m
1 stop
Depart: Sat Oct 3 2015 Return: Mon Oct 5 2015 Trip spans 3 days
United
United
ONT
3:00p
IAD
11:39p
8h 39m
1 stop
IAD
11:09a
ONT
7:27p
8h 18m
1 stop
Depart: Sun Oct 4 2015 Return: Tue Oct 6 2015 Trip spans 3 days
United
United
ONT
8:39a
IAD
7:03p
10h 24m
1 stop
IAD
2:38a
ONT
11:09a
8h 31m
1 stop
Depart: Mon Oct 5 2015 Return: Wed Oct 7 2015 Trip spans 3 days
United
United
ONT
3:00p
IAD
11:43p
8h 43m
1 stop
IAD
11:12a
ONT
7:27p
8h 15m
1 stop
Depart: Wed Oct 7 2015 Return: Sat Oct 10 2015 Trip spans 4 days
American Airlines
American Airlines
ONT
3:10a
IAD
10:59a
7h 49m
1 stop
IAD
11:18a
ONT
7:01p
7h 43m
1 stop
Depart: Thu Oct 8 2015 Return: Fri Oct 16 2015 Trip spans 9 days
United
United
ONT
2:49a
IAD
10:05a
7h 16m
1 stop
IAD
6:00a
ONT
4:31p
10h 31m
1 stop
Depart: Fri Oct 9 2015 Return: Mon Oct 12 2015 Trip spans 4 days
United
United
ONT
2:01p
IAD
11:11p
9h 10m
1 stop
IAD
12:45p
ONT
11:29p
10h 44m
1 stop
Depart: Tue Oct 27 2015 Return: Mon Nov 2 2015 Trip spans 7 days
Alaska Airlines
Alaska Airlines
ONT
2:00a
IAD
10:50a
8h 50m
1 stop
IAD
1:50p
ONT
8:08a
18h 18m
1 stop
Airports
Origin

Ontario
$360
Destination

Washington
$360