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>

$127 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

$200

Typical prices: $186-$341

Porter Airlines

Mon 1/12Mon 1/19

YTZ - IAD • Non-stop

Cheapest one-way

$127

Typical prices: $126-$208

Porter Airlines

Mon 1/5

YTZ - IAD • Non-stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Dulles Intl!

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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Ontario to Dulles Intl

Mon, Jan 12 - Mon, Jan 19

8:50 am - 10:19 am

YTZ

IAD

1h 29mnonstop

11:35 am - 1:09 pm

IAD

YTZ

1h 34mnonstop

$200Porter Airlines

Thu, Mar 26 - Mon, Mar 30

8:55 am - 10:24 am

YTZ

IAD

1h 29mnonstop

11:40 am - 1:10 pm

IAD

YTZ

1h 30mnonstop

$205Porter Airlines

Thu, Jan 8 - Tue, Jan 13

6:55 pm - 8:26 pm

YYZ

IAD

1h 31mnonstop

9:00 am - 10:29 am

IAD

YYZ

1h 29mnonstop

$205Air Canada

Tue, Jan 20 - Wed, Feb 11

6:55 pm - 8:26 pm

YYZ

IAD

1h 31mnonstop

9:00 am - 10:29 am

IAD

YYZ

1h 29mnonstop

$206Air Canada

Thu, Jan 8 - Sun, Jan 11

8:50 am - 10:19 am

YTZ

IAD

1h 29mnonstop

11:35 am - 1:09 pm

IAD

YTZ

1h 34mnonstop

$209Porter Airlines

Mon, Jan 5 - Mon, Jan 12

8:50 am - 10:19 am

YTZ

IAD

1h 29mnonstop

11:35 am - 1:09 pm

IAD

YTZ

1h 34mnonstop

$216Air Transat

Wed, Jan 28 - Wed, Feb 4

8:50 am - 10:19 am

YTZ

IAD

1h 29mnonstop

9:45 am - 2:25 pm

IAD

YTZ

4h 40m1 stop

$218Multiple Airlines

Fri, Jan 30 - Fri, Feb 6

7:00 pm - 8:54 pm

YUL

IAD

1h 54mnonstop

11:40 am - 4:30 pm

IAD

YUL

4h 50m1 stop

$274Multiple Airlines

Fri, Jan 16 - Fri, Jan 16

9:45 am - 11:49 am

YOW

IAD

2h 04mnonstop

5:50 pm - 1:32 pm

IAD

YOW

19h 42m2 stops

$304United Airlines

Tue, Jan 13 - Fri, Jan 16

9:50 am - 5:35 pm

YXU

IAD

7h 45m2 stops

8:29 am - 5:05 pm

IAD

YXU

8h 36m2 stops

$564United Airlines

Useful Info

Low season	September
High season	December
Cheapest flight	$127

Best time to beat the crowds but there is an average 16% increase in price.

Most popular time to fly with an average 8% increase in price.

Flight from Toronto Island 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

Ellicott City

Greenbelt

Edgewood

Colonial Beach

Pikesville

Hunt Valley

Lutherville Timonium

Camp Springs

Stevensville

Everything you need to know for your flight to Dulles Intl

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Washington Dulles Airport (IAD)

$127 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