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

Depart
Return
1 adult
Adults
18-64
Seniors
65+
Youths
12-17
Children
2-11
Seat Infants
under 2
Lap Infants
under 2
The price shown for each flight will be the average for all passengers including any infants.
Compare vs. KAYAK all | none
Browse Origins:
Browse Destinations:

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: Wed Oct 12 2016 Return: Tue Oct 18 2016 Trip spans 7 days
Major Airline
Major Airline
ONT
10:00p
IAD
6:50a
8h 50m
1 stop
IAD
10:50a
ONT
5:12a
18h 22m
1 stop
Depart: Tue Oct 25 2016 Return: Wed Nov 2 2016 Trip spans 9 days
American Airlines
American Airlines
ONT
6:48a
IAD
3:53p
9h 05m
1 stop
IAD
2:59p
ONT
10:17p
7h 18m
1 stop
Depart: Wed Oct 26 2016 Return: Sat Oct 29 2016 Trip spans 4 days
United
United
ONT
2:00a
IAD
10:30a
8h 30m
1 stop
IAD
3:15a
ONT
11:12a
7h 57m
1 stop
Depart: Thu Oct 27 2016 Return: Mon Oct 31 2016 Trip spans 5 days
Delta
Delta
ONT
6:22a
IAD
5:15p
10h 53m
2 stops
IAD
1:18p
ONT
9:59p
8h 41m
2 stops
Depart: Tue Nov 1 2016 Return: Tue Nov 8 2016 Trip spans 8 days
American Airlines
American Airlines
ONT
6:48a
IAD
3:53p
9h 05m
1 stop
IAD
2:14a
ONT
11:33a
9h 19m
1 stop
Depart: Sat Oct 29 2016 Return: Tue Nov 1 2016 Trip spans 4 days
United
United
ONT
1:45a
IAD
8:36a
6h 51m
1 stop
IAD
12:14p
ONT
7:22p
7h 08m
1 stop
Depart: Sat Oct 15 2016 Return: Tue Oct 18 2016 Trip spans 4 days
Major Airline
Major Airline
ONT
10:00p
IAD
6:50a
8h 50m
1 stop
IAD
10:50a
ONT
5:12a
18h 22m
1 stop
Depart: Wed Nov 2 2016 Return: Sat Nov 5 2016 Trip spans 4 days
American Airlines
American Airlines
ONT
6:48a
IAD
3:53p
9h 05m
1 stop
IAD
3:14a
ONT
12:33p
9h 19m
1 stop
Depart: Sat Nov 5 2016 Return: Tue Nov 8 2016 Trip spans 4 days
United
United
ONT
1:45a
IAD
8:12a
6h 27m
1 stop
IAD
11:14a
ONT
6:22p
7h 08m
1 stop
Depart: Tue Nov 8 2016 Return: Tue Nov 15 2016 Trip spans 8 days
American Airlines
American Airlines
ONT
5:55a
IAD
2:19p
8h 24m
1 stop
IAD
9:54a
ONT
6:14p
8h 20m
1 stop
Depart: Sat Nov 12 2016 Return: Tue Nov 15 2016 Trip spans 4 days
United
United
ONT
12:45a
IAD
7:12a
6h 27m
1 stop
IAD
11:14a
ONT
6:22p
7h 08m
1 stop
Depart: Thu Oct 13 2016 Return: Sat Oct 22 2016 Trip spans 10 days
Major Airline
Major Airline
ONT
10:00p
IAD
6:50a
8h 50m
2 stops
IAD
10:50a
ONT
5:12a
18h 22m
2 stops
Depart: Wed Nov 9 2016 Return: Tue Nov 15 2016 Trip spans 7 days
American Airlines
American Airlines
ONT
5:55a
IAD
2:19p
8h 24m
1 stop
IAD
6:29a
ONT
4:46p
10h 17m
1 stop
Depart: Wed Nov 30 2016 Return: Tue Dec 6 2016 Trip spans 7 days
United
United
ONT
8:33a
IAD
2:45p
6h 12m
1 stop
IAD
11:17a
ONT
6:22p
7h 05m
1 stop
Depart: Fri Nov 11 2016 Return: Wed Nov 16 2016 Trip spans 6 days
American Airlines
American Airlines
ONT
8:10p
IAD
2:49a
6h 39m
1 stop
IAD
9:54a
ONT
6:14p
8h 20m
1 stop
Depart: Tue Dec 6 2016 Return: Wed Dec 7 2016 Trip spans 2 days
United
United
ONT
8:33a
IAD
2:45p
6h 12m
1 stop
IAD
11:17a
ONT
6:22p
7h 05m
1 stop
Depart: Sat Nov 19 2016 Return: Thu Jan 5 2017 Trip spans 48 days
Major Airline
Major Airline
ONT
8:15a
IAD
4:52a
20h 37m
2 stops
IAD
9:00a
ONT
2:48a
17h 48m
2 stops
Depart: Tue Nov 15 2016 Return: Sat Dec 3 2016 Trip spans 19 days
American Airlines
American Airlines
ONT
5:55a
IAD
2:19p
8h 24m
1 stop
IAD
2:14a
ONT
11:33a
9h 19m
1 stop
Depart: Tue Oct 11 2016 Return: Sat Oct 22 2016 Trip spans 12 days
United
United
ONT
9:35a
IAD
3:53p
6h 18m
1 stop
IAD
4:25a
ONT
11:49a
7h 24m
1 stop
Depart: Sun Oct 9 2016 Return: Tue Oct 18 2016 Trip spans 10 days
Major Airline
Major Airline
ONT
10:00p
IAD
6:50a
8h 50m
2 stops
IAD
10:50a
ONT
5:12a
18h 22m
2 stops
* Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an email and someone from our team will get back to you promptly.

Airports
Origin

Ontario
$289
Destination

Washington
$289