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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$123 CHEAP FLIGHTS from Ontario to Washington Dulles (IAD)

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

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Cheapest round-trip

$198

Typical prices: $195-$234

Porter Airlines

Fri 4/10Sun 4/12

YTZ - IAD • Non-stop

Cheapest one-way

$123

Typical prices: $146-$243

Air Canada

Tue 3/3

YYZ - IAD • 1 stop

Start a new search

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We hope you love your trip to Dulles Intl!

Flight Deals

Cheap Flights from Ontario to Dulles Intl

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Dulles Intl

Fri, Apr 10 - Sun, Apr 12

8:55 am - 10:24 am

YTZ

IAD

1h 29mnonstop

11:40 am - 1:10 pm

IAD

YTZ

1h 30mnonstop

$198Porter Airlines

Thu, Mar 5 - Tue, Apr 7

8:55 am - 10:24 am

YTZ

IAD

1h 29mnonstop

6:30 pm - 8:00 pm

IAD

YTZ

1h 30mnonstop

$199Porter Airlines

Wed, May 27 - Sun, May 31

6:55 pm - 8:29 pm

YYZ

IAD

1h 34mnonstop

9:55 am - 11:22 am

IAD

YYZ

1h 27mnonstop

$207Air Canada

Wed, Feb 25 - Wed, Mar 4

5:30 pm - 9:23 pm

YYZ

IAD

3h 53m

1 stop

1:02 pm - 6:34 pm

IAD

YYZ

5h 32m

1 stop

$210Air Canada

Thu, Feb 19 - Sun, Feb 22

8:50 am - 10:22 am

YTZ

IAD

1h 32mnonstop

9:45 am - 2:25 pm

IAD

YTZ

4h 40m

1 stop

$214Multiple Airlines

Thu, Mar 26 - Tue, Mar 31

6:45 pm - 12:27 am

YUL

IAD

5h 42m

1 stop

6:01 am - 11:37 am

IAD

YUL

5h 36m

1 stop

$271Delta

Thu, Feb 19 - Sun, Feb 22

9:29 am - 8:45 pm

YUL

IAD

11h 16m

2 stops

7:15 am - 4:53 pm

IAD

YUL

9h 38m

1 stop

$278Delta

Mon, Mar 9 - Tue, Mar 10

7:30 pm - 9:23 pm

YOW

IAD

1h 53mnonstop

8:26 am - 1:32 pm

IAD

YOW

5h 06m

1 stop

$296United Airlines

Fri, Mar 6 - Mon, Mar 9

4:20 pm - 7:24 am

YOW

IAD

15h 04m

1 stop

11:40 am - 3:04 pm

IAD

YOW

3h 24m

1 stop

$300Multiple Airlines

Tue, Mar 10 - Tue, Mar 10

9:45 am - 11:44 am

YOW

IAD

1h 59mnonstop

10:20 pm - 1:32 pm

IAD

YOW

15h 12m

2 stops

$307United Airlines

Useful Info

Low season	September
High season	July
Cheapest flight	$123

Best time to beat the crowds but there is an average 18% increase in price.

Most popular time to fly and prices are also 19% lower on average.

Flight from Toronto Pearson Airport to Washington Dulles Airport

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.

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.

Winchester

Linthicum Heights

Hanover

Springfield

Gaithersburg

Towson

Martinsburg

Oxon Hill

Owings Mills

Charles Town

Glen Burnie

Greenbelt

Ellicott City

Edgewood

Colonial Beach

Pikesville

Lutherville Timonium

Hunt Valley

Camp Springs

Stevensville

Everything you need to know for your flight to Dulles Intl

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Information on your arrival and departure airports

Washington Dulles Airport (IAD)

$123 Find Cheap Flights from Ontario to Washington Dulles Airport

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

Everything you should know

Cheap Flights from Ontario to Dulles Intl

Recent round-trip flight deals from Ontario to Dulles Intl

Recent one-way flight deals from Ontario to Dulles Intl

Recent last minute flight deals from Ontario to Dulles Intl

Recent direct flight deals from Ontario to Dulles Intl

Good to know

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

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?

Everything you need to know for your flight to Dulles Intl

Information on your arrival and departure airports

Cabin class types available on flights to Dulles Intl

Complete your trip to Dulles Intl with a hotel stay or car rental

Find direct flights for Dulles Intl

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Washington, D.C.

Find deals for your return flight