What are the cheapest airlines to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport one-way?

One-way options have recently been found by users for as low as C$ 158 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 180 and Air Canada from C$ 196 one-way.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What are the most popular routes from Region of Ontario to Washington, D.C. Dulles Intl Airport?

When deciding which route to take from Region of Ontario to Washington, D.C. Dulles Intl Airport consider Toronto Pearson Intl - Washington, D.C. Dulles Intl, Toronto Island - Washington, D.C. Dulles Intl or Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl as they are the most popular.

What are the cheapest flights from Region of Ontario to Washington, D.C. Dulles Intl Airport?

The cheapest flight price from Region of Ontario to Washington, D.C. Dulles Intl Airport is C$ 191. On average you can expect to pay C$ 932. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 346.

What are the most popular airlines that fly from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Air Canada, Porter Airlines and United Airlines are the most popular airlines when flying from Region of Ontario to Washington, D.C. Dulles Intl Airport.

Can I find deals for flights from Ontario to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Ontario to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ontario to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dulles Intl.

Can I find deals for business class flights from Ontario to Dulles Intl?

Yes. Cheapflights offers flight deals from Ontario to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 188+ Cheap Flights from Ontario to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Ontario to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Ontario to Dulles Intl
Explore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Thu 10/129:10 a.m. -

Nonstop1h 30m

Thu 17/1211:20 a.m. -

Nonstop1h 30m

Deal found 10/11C$ 281

Thu 3/129:10 a.m. -

Nonstop1h 30m

Tue 8/1211:20 a.m. -

Nonstop1h 30m

Deal found 9/11C$ 282

Tue 24/119:10 a.m. -

Nonstop1h 29m

Mon 30/116:25 p.m. -

Nonstop1h 30m

Deal found 9/11C$ 284

Tue 22/129:10 a.m. -

Nonstop1h 30m

Tue 5/111:20 a.m. -

Nonstop1h 32m

Deal found 10/11C$ 285

Tue 15/129:10 a.m. -

Nonstop1h 30m

Wed 16/1211:20 a.m. -

Nonstop1h 30m

Deal found 9/11C$ 295

Thu 17/129:10 a.m. -

Nonstop1h 30m

Tue 5/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 299

Sat 5/129:10 a.m. -

Nonstop1h 30m

Sun 6/1211:20 a.m. -

Nonstop1h 30m

Deal found 9/11C$ 301

Sat 5/126:40 p.m. -

Nonstop1h 30m

Sun 6/129:55 a.m. -

Nonstop1h 27m

Deal found 9/11C$ 303

Thu 17/129:10 a.m. -

Nonstop1h 30m

Sat 9/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 305

Wed 16/129:10 a.m. -

Nonstop1h 30m

Sat 9/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 306

Thu 3/129:10 a.m. -

Nonstop1h 30m

Sun 6/1211:20 a.m. -

Nonstop1h 30m

Deal found 9/11C$ 308

Wed 23/129:10 a.m. -

Nonstop1h 30m

Tue 29/1211:20 a.m. -

Nonstop1h 30m

Deal found 7/11C$ 310

Best flights from Ontario to Dulles Intl
Discover carefully curated flight deals from Ontario to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Thu 10/129:10 a.m. -

Nonstop1h 30m

Sun 10/111:20 a.m. -

Nonstop1h 32m

Deal found 5/11C$ 330

Sat 5/123:20 p.m. -

Nonstop1h 27m

Sun 6/129:05 a.m. -

1 stop5h 16m

Deal found 9/11C$ 371

Sat 5/126:10 p.m. -

1 stop5h 13m

Sat 12/1211:30 a.m. -

1 stop5h 50m

Deal found 10/11C$ 377

Tue 1/126:40 p.m. -

1 stop4h 14m

Mon 7/129:05 a.m. -

1 stop4h 41m

Deal found 5/11C$ 466

Sat 19/1210:00 a.m. -

Nonstop1h 50m

Tue 5/110:10 p.m. -

Nonstop1h 42m

Deal found 9/11C$ 514

Fri 11/124:15 p.m. -

Nonstop1h 30m

Mon 14/1211:20 a.m. -

Nonstop1h 30m

Deal found 5/11C$ 330

Fri 15/19:10 a.m. -

Nonstop1h 32m

Sat 23/111:20 a.m. -

Nonstop1h 32m

Deal found 7/11C$ 333

Sun 22/113:20 p.m. -

Nonstop1h 27m

Wed 25/115:20 p.m. -

Nonstop1h 37m

Deal found 7/11C$ 392

Wed 9/129:45 a.m. -

1 stop6h 38m

Fri 11/126:00 a.m. -

1 stop7h 35m

Deal found 5/11C$ 411

Wed 16/129:10 a.m. -

Nonstop1h 30m

Sun 10/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 351

Thu 3/1212:15 p.m. -

1 stop4h 08m

Sun 6/126:00 a.m. -

1 stop5h 28m

Deal found 6/11C$ 411

Thu 10/126:40 p.m. -

1 stop4h 14m

Sun 13/129:55 a.m. -

Nonstop1h 27m

Deal found 8/11C$ 474

Tue 24/1110:20 a.m. -

1 stop5h 33m

Thu 26/111:19 p.m. -

1 stop4h 32m

Deal found 9/11C$ 435

Thu 10/126:00 a.m. -

1 stop4h 42m

Sun 13/126:00 a.m. -

1 stop5h 28m

Deal found 5/11C$ 411

Mon 21/129:10 a.m. -

Nonstop1h 30m

Mon 4/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 381

Sat 28/1110:00 a.m. -

Nonstop1h 45m

Tue 1/129:55 a.m. -

Nonstop1h 27m

Deal found 9/11C$ 484

Mon 7/126:00 a.m. -

1 stop5h 49m

Sun 13/126:00 a.m. -

1 stop5h 28m

Deal found 9/11C$ 422

Tue 22/129:10 a.m. -

Nonstop1h 30m

Tue 29/1211:20 a.m. -

Nonstop1h 30m

Deal found 7/11C$ 389

Wed 23/122:00 p.m. -

Nonstop2h 01m

Wed 30/121:17 p.m. -

Nonstop1h 50m

Deal found 7/11C$ 597

Wed 25/116:30 a.m. -

1 stop10h 17m

Sun 29/115:20 p.m. -

1 stop4h 32m

Deal found 9/11C$ 507

Thu 7/16:10 a.m. -

1 stop5h 49m

Sat 16/112:49 p.m. -

1 stop6h 25m

Deal found 9/11C$ 428

Mon 23/119:10 a.m. -

Nonstop1h 29m

Fri 27/1111:20 a.m. -

Nonstop1h 30m

Deal found 5/11C$ 394

Wed 25/115:30 a.m. -

2 stops15h 40m

Sun 29/115:20 p.m. -

1 stop4h 32m

Deal found 9/11C$ 557

Tue 5/12:00 p.m. -

Nonstop2h 01m

Sun 10/15:47 p.m. -

1 stop4h 09m

Deal found 6/11C$ 615

Sat 19/129:10 a.m. -

Nonstop1h 30m

Tue 5/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 396

Sun 28/36:00 p.m. -

1 stop5h 00m

Sun 4/48:15 a.m. -

1 stop5h 11m

Deal found 7/11C$ 618

Fri 20/116:00 a.m. -

1 stop4h 57m

Sun 22/116:00 a.m. -

1 stop5h 19m

Deal found 9/11C$ 481

Wed 2/122:00 p.m. -

Nonstop1h 53m

Fri 4/125:20 p.m. -

1 stop4h 32m

Deal found 9/11C$ 598

Fri 26/32:48 p.m. -

1 stop5h 38m

Mon 5/45:20 p.m. -

1 stop4h 36m

Deal found 7/11C$ 618

Mon 21/129:10 a.m. -

Nonstop1h 30m

Thu 7/111:20 a.m. -

Nonstop1h 32m

Deal found 9/11C$ 437

Find flight deals from Ontario to Dulles Intl

Round-trip from	C$ 281
One-way from	C$ 188
Popular in	March
Cheapest in	November
Average price	C$ 320
Good round-trip deal	C$ 289 or less
Good one-way deal	C$ 289 or less

Porter Airlines
10/12-17/12
Nonstop
3h 00m total
Ontario to Washington, D.C.

Search Deals

Porter Airlines
7/3-31/12
Nonstop
1h 30m total
Ontario to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (C$ 52 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 13 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in November 2026

Search Deals

Price to beat on a round-trip flight from Ontario to Washington, D.C. Dulles Intl.

Search Deals

Price to beat on a one-way flight from Ontario to Washington, D.C. Dulles Intl.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoWashington, D.C.

YTZ Toronto Island - IAD Washington, D.C. Dulles Intl

YTZIAD

Toronto Island

Sun 28/3

9:10 a.m.-10:40 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 205

Quickest round-trip

TorontoWashington, D.C.

YTZ Toronto Island - IAD Washington, D.C. Dulles Intl

YTZIAD

Toronto Island

Thu 3/12

3:20 p.m.-4:47 p.m.

Nonstop1h 27m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 224

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Mon 11/1

12:10 p.m.-4:45 p.m.

1 stop4h 35m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 230

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Mon 7/12

12:18 p.m.-5:33 p.m.

1 stop5h 15m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 234

TorontoWashington, D.C.

YTZ Toronto Island - IAD Washington, D.C. Dulles Intl

YTZIAD

Toronto Island

Tue 22/12

9:10 a.m.-10:40 a.m.

Nonstop1h 30m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 238

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 26/11

12:15 p.m.-7:16 p.m.

1 stop7h 01m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 247

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 17/12

2:25 p.m.-11:23 p.m.

1 stop8h 58m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 247

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Fri 8/1

12:10 p.m.-4:45 p.m.

1 stop4h 35m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 253

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 7/1

6:10 a.m.-11:59 a.m.

1 stop5h 49m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 255

TorontoWashington, D.C.

YYZ Toronto Pearson Intl - IAD Washington, D.C. Dulles Intl

YYZIAD

Toronto Pearson Intl

Thu 3/12

2:45 p.m.-4:24 p.m.

Nonstop1h 39m

Washington, D.C. Dulles Intl

Wed 31/12

12:00 a.m.-12:00 a.m.

Nonstop0h 00m

C$ 267

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Ontario to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Ontario with our price prediction graph.

YTZ-IAD

YYZ-IAD

YOW-IAD

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Washington, D.C. Dulles Intl Airport

CAON-IAD

YTZ-IAD

YYZ-IAD

YOW-IAD

What is the cheapest month to book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 382). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of C$ 461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to IAD?

Unlike at noon, when flights are generally more expensive, you can save up to 33% on flights from Region of Ontario to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Region of Ontario to Washington, D.C. Dulles Intl Airport

The most flights from CAON to IAD are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 on average).

How much does it cost to fly round-trip from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Region of Ontario to Washington, D.C. Dulles Intl Airport flights typically cost between C$ 337 and C$ 604 in December.
The cheapest round-trip price found within the last 5 days was C$ 303 on Air Canada (5 Dec-6 Dec).

How far ahead should I book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from Region of Ontario to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Region of Ontario to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

How long is the flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?
Departing from Region of Ontario to Washington, D.C. Dulles Intl Airport will take you 1h 27m. There are 546 km between Region of Ontario and Washington, D.C. Dulles Intl Airport. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport one-way?
One-way options have recently been found by users for as low as C$ 158 on Porter Airlines. Other airlines that offer cheap prices include United Airlines from C$ 180 and Air Canada from C$ 196 one-way.
What are the most popular routes from Region of Ontario to Washington, D.C. Dulles Intl Airport?
When deciding which route to take from Region of Ontario to Washington, D.C. Dulles Intl Airport consider Toronto Pearson Intl - Washington, D.C. Dulles Intl, Toronto Island - Washington, D.C. Dulles Intl or Montreal Pierre Elliott Trudeau Intl - Washington, D.C. Dulles Intl as they are the most popular.
What are the most reliable airlines from Region of Ontario to Washington, D.C. Dulles Intl Airport?
The top 3 most reliable airlines when flying from Region of Ontario to Washington, D.C. Dulles Intl Airport are ANA (100%), Republic Airways (92%) and Copa Airlines (88%).
What are the cheapest flights from Region of Ontario to Washington, D.C. Dulles Intl Airport?
The cheapest flight price from Region of Ontario to Washington, D.C. Dulles Intl Airport is C$ 191. On average you can expect to pay C$ 932. The most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl), can usually be booked for C$ 346.
Can I find deals for flights from Ontario to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Ontario to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Dulles Intl.
Can I find deals for business class flights from Ontario to Dulles Intl?
Yes. Cheapflights offers flight deals from Ontario to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?
Currently, April is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport (average of C$ 382). Flying from Region of Ontario to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of C$ 461). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Hanover

College Park

Alexandria

Oxon Hill

Chantilly

Gaithersburg

Reston

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Ellicott City

Arlington

Fredericksburg

Ashburn

Rockville

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Alternative routes for Ontario to Dulles Intl

Pearson Intl to Reagan-National flights

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Toronto Island to Dulles Intl flights

Pearson Intl to Baltimore flights

Pierre Elliott Trudeau Intl to Dulles Intl flights

Pierre Elliott Trudeau Intl to Reagan-National flights

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Winnipeg to Baltimore flights

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Calgary to Baltimore flights

Edmonton to Dulles Intl flights

Edmonton to Baltimore flights

Halifax to Reagan-National flights

Edmonton to Reagan-National flights

St. John's to Dulles Intl flights

Halifax to Dulles Intl flights

Victoria to Reagan-National flights

Thunder Bay to Dulles Intl flights

Québec City to Reagan-National flights

Kelowna to Baltimore flights

Kamloops to Dulles Intl flights

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Victoria to Dulles Intl flights

Victoria to Baltimore flights

Halifax to Baltimore flights

London to Dulles Intl flights

Saskatoon to Baltimore flights

Kamloops to Baltimore flights

Kelowna to Reagan-National flights

Kelowna to Dulles Intl flights

Québec City to Baltimore flights

Regina to Dulles Intl flights

Regina to Reagan-National flights

Fredericton to Dulles Intl flights

St. John's to Baltimore flights

St. John's to Reagan-National flights

Saskatoon to Reagan-National flights

London to Reagan-National flights

Top 5 airlines flying from Ontario to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	CheapestC$ 128	AverageC$ 502	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Delta	CheapestC$ 199	AverageC$ 355	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Porter Airlines	CheapestC$ 236	AverageC$ 366	FlexibilityNo cancel fee	On-time52%	Search Porter Airlines flights
Air Transat	CheapestC$ 291	AverageC$ 529	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
United Airlines	CheapestC$ 313	AverageC$ 539	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Ontario to Dulles Intl?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Dulles Intl from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to Dulles Intl?

Cheapflights helps you find that perfect flight to Dulles Intl from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to Dulles Intl with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Dulles Intl flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Ontario today and book when prices fit your budget.

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Cheap flights from Ontario to Washington, D.C. Dulles Intl Airport from C$ 188

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to Dulles Intl

Cheapest flights from Ontario to Dulles IntlExplore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Explore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Best flights from Ontario to Dulles IntlDiscover carefully curated flight deals from Ontario to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Discover carefully curated flight deals from Ontario to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Direct flights from Ontario to Dulles IntlExplore direct flight options from Ontario to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Explore direct flight options from Ontario to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Last-minute flights from Ontario to Dulles IntlDiscover last-minute flight deals from Ontario to Dulles Intl. Data last updated 10 November 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to Dulles Intl. Data last updated 10 November 2026 and is based on user searches.

One-way flights from Ontario to Dulles IntlSearch for one-way flight options from Ontario to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

Search for one-way flight options from Ontario to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

Find flight deals from Ontario to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Ontario to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Ontario with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

What is the cheapest time of day to fly from ON to IAD?

Find hourly flight availability from Ontario to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 10 November 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 33% on flights from Region of Ontario to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Region of Ontario to Washington, D.C. Dulles Intl Airport

The most flights from CAON to IAD are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 on average).

How much does it cost to fly round-trip from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Region of Ontario to Washington, D.C. Dulles Intl Airport flights typically cost between C$ 337 and C$ 604 in December.The cheapest round-trip price found within the last 5 days was C$ 303 on Air Canada (5 Dec-6 Dec).

How far ahead should I book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

The price you pay for your flight from Region of Ontario to Washington, D.C. Dulles Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 34 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Dulles Intl. Price data was last updated on 7 November 2026.

Related info for your journey

How long is the flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

What are the cheapest airlines to fly from Region of Ontario to Washington, D.C. Dulles Intl Airport one-way?

What are the most popular routes from Region of Ontario to Washington, D.C. Dulles Intl Airport?

What are the most reliable airlines from Region of Ontario to Washington, D.C. Dulles Intl Airport?

What are the cheapest flights from Region of Ontario to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Ontario to Dulles Intl that include hotel bookings?

How can I find direct flights from Ontario to Dulles Intl?

Can I find deals for business class flights from Ontario to Dulles Intl?

What is the cheapest month to book a flight from Region of Ontario to Washington, D.C. Dulles Intl Airport?

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Alternative routes for Ontario to Dulles Intl

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Direct flights to District of Columbia

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Other flights to Dulles Intl

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Ontario and Dulles Intl flights

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Cheapest flights from Ontario to Dulles Intl
Explore the most affordable flight options available from Ontario to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 November 2026.

Best flights from Ontario to Dulles Intl
Discover carefully curated flight deals from Ontario to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 10 November 2026.

Direct flights from Ontario to Dulles Intl
Explore direct flight options from Ontario to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 November 2026.

Last-minute flights from Ontario to Dulles Intl
Discover last-minute flight deals from Ontario to Dulles Intl. Data last updated 10 November 2026 and is based on user searches.

One-way flights from Ontario to Dulles Intl
Search for one-way flight options from Ontario to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 10 November 2026.

Region of Ontario to Washington, D.C. Dulles Intl Airport flights typically cost between C$ 337 and C$ 604 in December.
The cheapest round-trip price found within the last 5 days was C$ 303 on Air Canada (5 Dec-6 Dec).