$139 Find Cheap Flights from Ontario to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Dulles Intl departing on 5/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Ontario to Dulles Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Dulles Intl

Wed, Jun 3 - Mon, Jun 8
Porter Airlines Logo
1:50 pm - 3:21 pm
YTZ
-
IAD
1h 31mnonstop
Porter Airlines Logo
4:05 pm - 5:35 pm
IAD
-
YTZ
1h 30mnonstop
$197Porter Airlines
Wed, Jun 3 - Mon, Jun 8
Air Canada Logo
10:45 am - 3:03 pm
YTZ
-
IAD
4h 18m
1 stop
Air Canada Logo
5:15 pm - 6:42 pm
IAD
-
YTZ
1h 27mnonstop
$199Air Canada
Thu, Jun 11 - Tue, Jun 16
Air Canada Logo
2:55 pm - 4:12 pm
YTZ
-
IAD
1h 17mnonstop
Air Canada Logo
5:15 pm - 6:42 pm
IAD
-
YTZ
1h 27mnonstop
$200Air Canada
Mon, May 11 - Thu, May 14
Porter Airlines Logo
9:15 am - 10:46 am
YTZ
-
IAD
1h 31mnonstop
Porter Airlines Logo
11:30 am - 1:00 pm
IAD
-
YTZ
1h 30mnonstop
$202Porter Airlines
Thu, May 21 - Mon, May 25
Porter Airlines Logo
9:15 am - 10:46 am
YTZ
-
IAD
1h 31mnonstop
Porter Airlines Logo
4:05 pm - 5:35 pm
IAD
-
YTZ
1h 30mnonstop
$203Porter Airlines
Thu, Jun 18 - Sun, Jun 21
Delta Logo
6:05 am - 10:20 am
YYZ
-
IAD
4h 15m
1 stop
Delta Logo
6:05 am - 1:34 pm
IAD
-
YYZ
7h 29m
1 stop
$225Delta
Sun, May 24 - Sat, May 30
Delta Logo
6:10 am - 10:22 am
YYZ
-
IAD
4h 12m
1 stop
Delta Logo
6:00 am - 1:30 pm
IAD
-
YYZ
7h 30m
1 stop
$234Delta
Fri, Jun 19 - Fri, Jun 19
Lufthansa Logo
6:05 am - 11:28 am
YOW
-
IAD
5h 23m
1 stop
Lufthansa Logo
10:10 pm - 11:54 pm
IAD
-
YOW
1h 44mnonstop
$339Lufthansa
Wed, Jun 10 - Wed, Jun 17
United Airlines Logo
3:30 pm - 9:26 pm
YXU
-
IAD
5h 56m
1 stop
United Airlines Logo
10:29 pm - 2:57 pm
IAD
-
YXU
16h 28m
2 stops
$592United Airlines
Wed, Jun 10 - Wed, Jun 17
United Airlines Logo
5:10 am - 4:32 pm
YXU
-
IAD
11h 22m
2 stops
United Airlines Logo
6:33 am - 2:58 pm
IAD
-
YXU
8h 25m
2 stops
$598United Airlines
Useful Info

Good to know

Low seasonJanuary
Cheapest flight$139
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Toronto Island to Washington Dulles Airport

Flights from Ontario to Dulles Intl: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Ontario to Dulles Intl 
Learn how KAYAK collects reviews and tips from users.
KaseyFlew with Air Canada
YYZ
-
IAD
Jun 2025
Come way early as US customs line up eats up your time
Verified travelerFlew with Air Canada
YYZ
-
IAD
Dec 2024
Get on a regional sized (smaller than Boeing 737 or Airbus A320) jet if you can, they are older and have more legroom than newer aircraft.
Verified travelerFlew with United Airlines
YYZ
-
IAD
Nov 2024
Do not carry bigger the specified sized bags for cabin baggage. Only one carry on ba
Verified travelerFlew with Air Canada
YYZ
-
IAD
Aug 2024
Check the departure board carefully when you get to the airport.

FAQs for booking Ontario to Washington Dulles Airport flights

  • How does KAYAK find such low prices on flights from Ontario to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Dulles Intl?

Book flights to Dulles Intl if you plan to visit one of these locations
Winchester
Linthicum Heights
Hanover
Springfield
Gaithersburg
Towson
Oxon Hill
Martinsburg
Owings Mills
Charles Town
Greenbelt
Glen Burnie
Edgewood
Ellicott City
Colonial Beach
Pikesville
Camp Springs
Hunt Valley
Lutherville Timonium
Westminster

Everything you need to know for your flight to Dulles Intl

Information on your arrival and departure airports

Washington Dulles Airport (IAD)