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Cheap flights from Washington, D.C. Dulles Intl Airport to Ontario from C$ 129

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
30 Mar — 6 Apr1
1 adult

Cheap flight deals from Dulles Intl to Ontario

Keep the following information in mind while searching for Dulles Intl to Ontario flight deals. Data was last updated 25 March 2025.

Round-trip from

C$ 268

One-way from

C$ 129

Popular in

August

Cheapest in

April

Average price

C$ 466

Good round-trip deal

C$ 296 or less

Good one-way deal

C$ 176 or less
Air Canada
  • Air Canada
  • 9/5-12/5
  • Nonstop
  • 3h 10m total
  • Washington, D.C. to Ontario
Search Deals
Porter Airlines
  • Porter Airlines
  • 7/4
  • Nonstop
  • 1h 30m total
  • Washington, D.C. to Ontario
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Ontario.
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Find flight deals from Dulles Intl to Ontario

Cheapest flights from Dulles Intl to Ontario
Explore the most affordable flight options available from Dulles Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2025.

Thu 1/59:45 a.m.IAD - YTZ
1 stop7h 05mAir Canada
Sun 4/54:20 p.m.YTZ - IAD
1 stop4h 53mAir Canada
Deal found 25/3C$ 269
Wed 9/41:45 p.m.IAD - YTZ
Nonstop1h 30mMultiple Airlines
Tue 15/48:55 p.m.YTZ - IAD
Nonstop1h 29mMultiple Airlines
Deal found 24/3C$ 272
Tue 8/41:45 p.m.IAD - YTZ
Nonstop1h 30mPorter Airlines
Sun 13/411:10 a.m.YTZ - IAD
Nonstop1h 29mPorter Airlines
Deal found 24/3C$ 275
Thu 8/59:45 a.m.IAD - YYZ
1 stop4h 49mAir Canada
Thu 15/58:10 a.m.YYZ - IAD
Nonstop1h 29mAir Canada
Deal found 23/3C$ 278
Thu 24/47:00 a.m.IAD - YOW
1 stop4h 14mPorter Airlines
Tue 29/47:00 a.m.YOW - IAD
1 stop5h 59mPorter Airlines
Deal found 24/3C$ 311
Thu 1/511:35 a.m.IAD - YUL
1 stop6h 20mMultiple Airlines
Mon 5/57:10 p.m.YUL - IAD
Nonstop1h 58mMultiple Airlines
Deal found 24/3C$ 317
Sat 24/54:20 p.m.IAD - YTZ
Nonstop1h 33mAir Transat
Tue 27/51:35 p.m.YTZ - IAD
Nonstop1h 31mAir Transat
Deal found 24/3C$ 321
Thu 1/54:20 p.m.IAD - YUL
1 stop3h 50mPorter Airlines
Thu 8/510:45 a.m.YUL - IAD
1 stop4h 21mPorter Airlines
Deal found 24/3C$ 322
Wed 16/42:40 p.m.IAD - YYZ
Nonstop1h 34mUnited Airlines
Sat 19/48:15 a.m.YYZ - IAD
Nonstop1h 31mUnited Airlines
Deal found 24/3C$ 330
Mon 14/410:25 p.m.IAD - YYZ
1 stop10h 54mMultiple Airlines
Tue 15/412:25 p.m.YYZ - IAD
Nonstop1h 31mMultiple Airlines
Deal found 24/3C$ 345
Wed 16/49:20 a.m.IAD - YYZ
1 stop5h 49mDelta
Wed 23/46:08 p.m.YYZ - IAD
1 stop4h 59mDelta
Deal found 23/3C$ 354
Sat 19/41:53 p.m.IAD - YUL
Nonstop1h 57mAir Canada
Sun 27/49:15 a.m.YUL - IAD
Nonstop1h 59mAir Canada
Deal found 23/3C$ 374

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 March 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ontario that are best for you.

Fly from

Dulles Intl

Fly to

Ontario

Route

Depart

Return

Price

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 1/5

9:45 a.m.-4:50 p.m.

1 stop7h 05m

Toronto Island

Sun 4/5

4:20 p.m.-9:13 p.m.

1 stop4h 53m

C$ 269

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 9/4

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

Toronto Island

Tue 15/4

8:55 p.m.-10:24 p.m.

Nonstop1h 29m

C$ 272

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 7/5

9:45 a.m.-2:34 p.m.

1 stop4h 49m

Toronto Pearson Intl

Wed 14/5

12:10 p.m.-1:41 p.m.

Nonstop1h 31m

C$ 272

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 8/4

1:45 p.m.-3:15 p.m.

Nonstop1h 30m

Toronto Island

Sun 13/4

11:10 a.m.-12:39 p.m.

Nonstop1h 29m

C$ 275

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Fri 9/5

4:20 p.m.-8:10 p.m.

1 stop3h 50m

Montreal Pierre Elliott Trudeau Intl

Fri 16/5

7:00 a.m.-1:41 p.m.

1 stop6h 41m

C$ 289

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Fri 9/5

9:45 a.m.-11:40 a.m.

Nonstop1h 55m

Montreal Pierre Elliott Trudeau Intl

Fri 16/5

5:00 a.m.-9:39 a.m.

1 stop4h 39m

C$ 294

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Fri 25/4

7:00 a.m.-11:15 a.m.

1 stop4h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 27/4

6:40 p.m.-10:24 p.m.

1 stop3h 44m

C$ 298

Washington, D.C.Ottawa

IAD - YOW

IADYOW

Washington, D.C. Dulles Intl

Thu 24/4

7:00 a.m.-11:14 a.m.

1 stop4h 14m

Ottawa

Tue 29/4

7:00 a.m.-12:59 p.m.

1 stop5h 59m

C$ 311

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 24/5

4:20 p.m.-5:53 p.m.

Nonstop1h 33m

Toronto Island

Tue 27/5

1:35 p.m.-3:06 p.m.

Nonstop1h 31m

C$ 321

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sat 24/5

10:23 p.m.-9:19 a.m.

1 stop10h 56m

Toronto Pearson Intl

Sun 25/5

12:10 p.m.-1:41 p.m.

Nonstop1h 31m

C$ 341

Flights are sorted by cheapest round-trip flights first.

Deals found on 24/3

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Best time to book a flight from Dulles Intl to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of C$ 167). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in July is currently the most expensive (average of C$ 258). 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 IAD to ON?

Find hourly flight availability from Dulles Intl to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 March 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to Region of Ontario as you normally would.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 mm per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 25 March 2025.
See what other customers who have flown with Delta, Porter Airlines and Air Transat from Washington, D.C. to Ontario have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,890 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Porter Airlines
7.9
Good
276 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Transat
7.8
Good
381 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Copa Airlines
7.6
Good
1,393 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very good
7,890 reviews
Check prices

Boarding

8.2

Crew

8.5

Comfort

8.0

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    The cheapest airline one-way is Porter Airlines, with whom users have recently found tickets for as low as C$ 129. However, be on the lookout for offers from Air Transat and Air Canada, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Region of Ontario for a low price.

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

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

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

    Before booking your flight to Region of Ontario from Washington, D.C. Dulles Intl Airport, check out the most reliable airlines to get you to your destination on time: ANA (77%), Copa Airlines (76%), Republic Airways( 76%).

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

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Region of Ontario? While on average our users pay C$ 658, our data indicates the cheapest price to be C$ 134. The most popular route (Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl), is priced around C$ 319.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Ontario 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 Washington, D.C. Dulles Intl Airport to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of C$ 167). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in July is currently the most expensive (average of C$ 258). 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.

See more FAQs

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Alternative routes for Dulles Intl to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Vancouver Intl flights
Dulles Intl to Pierre Elliott Trudeau Intl flights
Dulles Intl to Pearson Intl flights
Reagan-National to Pearson Intl flights
Dulles Intl to Toronto Island flights
Reagan-National to Pierre Elliott Trudeau Intl flights
Dulles Intl to Calgary flights
Baltimore to Vancouver Intl flights
Baltimore to Pearson Intl flights
Baltimore to Pierre Elliott Trudeau Intl flights
Reagan-National to Vancouver Intl flights
Baltimore to Calgary flights
Reagan-National to Calgary flights
Dulles Intl to Ottawa flights
Dulles Intl to Halifax flights
Baltimore to Halifax flights
Baltimore to Toronto Island flights
Dulles Intl to Québec City flights
Reagan-National to Ottawa flights
Baltimore to Ottawa flights
Dulles Intl to Abbotsford flights
Baltimore to Québec City flights
Reagan-National to Québec City flights
Dulles Intl to Edmonton flights
Reagan-National to Edmonton flights
Dulles Intl to Winnipeg flights
Baltimore to Edmonton flights
Baltimore to Winnipeg flights
Reagan-National to Winnipeg flights
Dulles Intl to Charlottetown flights
Reagan-National to Toronto Island flights
Dulles Intl to Victoria flights
Baltimore to Victoria flights
Dulles Intl to Deer Lake flights
Dulles Intl to Hamilton flights
Baltimore to Charlottetown flights
Dulles Intl to Kelowna flights
Dulles Intl to Thunder Bay flights

Top 3 airlines flying from Dulles Intl to Ontario

Discover the top 3 airlines that operate flights from Dulles Intl to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 185AverageC$ 534FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 195AverageC$ 465FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Porter AirlinesCheapestC$ 290AverageC$ 539FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Dulles Intl to Ontario flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Dulles Intl to Ontario for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from Dulles Intl to Ontario with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from Dulles Intl to Ontario on Cheapflights with our Price Alert feature and get notified when better prices are available.

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