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$89+ Cheap flights from Dulles Intl (IAD) to Ontario

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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — YYZ
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap 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 January 26, 2026.

This Trip.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 2/223:45 pm
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 1/26$200
This Kiwi.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/211:50 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 2/258:50 am
YTZ
-
IAD
Nonstop1h 32m
Porter Airlines
Deal found 1/25$207
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1911:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Mon 2/238:50 am
YTZ
-
IAD
Nonstop1h 32m
Porter Airlines
Deal found 1/26$208
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/281:45 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 4/18:55 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 1/26$209
This Kiwi.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/206:30 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Thu 2/268:50 am
YTZ
-
IAD
Nonstop1h 32m
Porter Airlines
Deal found 1/25$210
This Kiwi.com deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1111:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sun 3/153:45 pm
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 1/25$215
This Mytrip deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/141:45 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Sat 4/1811:00 am
YTZ
-
IAD
Nonstop1h 29m
Porter Airlines
Deal found 1/25$216
This FlightHub deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1811:40 am
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Mon 2/238:50 am
YTZ
-
IAD
Nonstop1h 32m
Porter Airlines
Deal found 1/26$219
This Trip.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/141:50 pm
IAD
-
YTZ
Nonstop1h 30m
Porter Airlines
Wed 2/188:50 am
YTZ
-
IAD
Nonstop1h 32m
Porter Airlines
Deal found 1/26$222
This Kiwi.com deal was found by Cheapflights users on 1/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:58 pm
IAD
-
YYZ
2 stops23h 18m
Multiple Airlines
Wed 3/48:20 pm
YYZ
-
IAD
1 stop13h 05m
Multiple Airlines
Deal found 1/23$245
This Kiwi.com deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/19:18 am
IAD
-
YYZ
1 stop9h 58m
Multiple Airlines
Sat 2/78:20 pm
YYZ
-
IAD
1 stop12h 13m
Multiple Airlines
Deal found 1/24$261
This United Airlines deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/296:00 am
IAD
-
YYZ
1 stop5h 43m
United Airlines
Sun 3/292:30 pm
YYZ
-
IAD
Nonstop1h 39m
United Airlines
Deal found 1/25$274

Find 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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$200
(Trip.com)

One-way from

$89
(Trip.com)

Popular in

November

Cheapest in

June

Average price

$283

Good round-trip deal

$187 or less

Good one-way deal

$128 or less
Provider with most accurate pricing for Washington, D.C. (WAS)-Toronto (YTO) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Toronto (YTO) flights.
Search Deals
From Washington, D.C. Dulles Intl to Ontario
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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.
Search Deals

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 2,558,603 searches. Data last updated January 26, 2026.
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

Sat 2/21

1:50 pm-3:20 pm

Nonstop1h 30m

Toronto Island

Mon 2/23

8:50 am-10:22 am

Nonstop1h 32m

$207

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 2/18

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Mon 2/23

8:50 am-10:22 am

Nonstop1h 32m

$219

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Mon 3/16

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Mon 3/23

8:55 am-10:24 am

Nonstop1h 29m

$228

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 3/4

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Mon 3/9

8:55 am-10:24 am

Nonstop1h 29m

$231

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 4/4

1:45 pm-3:15 pm

Nonstop1h 30m

Toronto Island

Sat 4/11

11:00 am-12:29 pm

Nonstop1h 29m

$232

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 2/21

1:50 pm-3:20 pm

Nonstop1h 30m

Toronto Island

Sun 2/22

3:45 pm-5:14 pm

Nonstop1h 29m

$234

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 3/5

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Wed 3/11

8:55 am-10:24 am

Nonstop1h 29m

$235

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 3/11

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Fri 3/20

3:45 pm-5:14 pm

Nonstop1h 29m

$235

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 3/14

1:45 pm-3:15 pm

Nonstop1h 30m

Toronto Island

Sat 3/21

11:00 am-12:29 pm

Nonstop1h 29m

$242

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 2/18

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Sun 2/22

3:45 pm-5:14 pm

Nonstop1h 29m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 60 results
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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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of $98). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in January is currently the most expensive (average of $193). 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 January 26, 2026.

Unlike in the evening, when flights are generally more expensive, you can save up to 30% on flights from Washington, D.C. Dulles Intl Airport to Region of Ontario by exploring options for tickets at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Ontario. Price data was last updated on January 24, 2026.

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

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

Explore weekly flight availability from Dulles Intl to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 26, 2026.

The most flights from IAD to CAON are scheduled on a Monday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (16 on average).

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

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 January 26, 2026.
Get a feel of what it's like to fly with Porter Airlines, Air Transat, and United Airlines from Washington, D.C. Dulles Intl Airport to Ontario by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Entertainment

6.9

Overall

7.9

Boarding

8.2

Crew

8.6

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
7.9
Good
412 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Entertainment

6.9

Overall

7.9

Boarding

8.2

Crew

8.6

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Transat
7.7
Good
501 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Entertainment

6.9

Overall

7.9

Boarding

8.2

Crew

8.6

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,200 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Entertainment

6.9

Overall

7.9

Boarding

8.2

Crew

8.6

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Air Canada
7.1
Good
10,656 reviews
Porter Airlines
7.9
Good
412 reviews

Comfort

7.9

Entertainment

6.9

Overall

7.9

Boarding

8.2

Crew

8.6

Food

7.5

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

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.

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

    For as low as $207, Porter Airlines can have you in Region of Ontario from Washington, D.C. Dulles Intl Airport in 1h 30m. Airlines will cover a distance of 339 mi. All flights are typically nonstop.

  • 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 $75. However, be on the lookout for offers from Air Canada and Air Transat, 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?

    The most popular flight routes from Washington, D.C. Dulles Intl Airport to Region of Ontario are Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Dulles Intl - Toronto Pearson Intl and Washington, D.C. Dulles Intl - Toronto Island.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario consider choosing ANA (68%), Copa Airlines (66%) or Republic Airways (66%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $1,125 for a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario. The cheapest flight overall is $88 while the most popular route, (Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at $243.

  • 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, March is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Region of Ontario (average of $98). Flying from Washington, D.C. Dulles Intl Airport to Region of Ontario in January is currently the most expensive (average of $193). 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
Reagan-National to Pierre Elliott Trudeau Intl flights
Reagan-National to Pearson Intl flights
Reagan-National to Vancouver Intl flights
Baltimore to Vancouver Intl flights
Dulles Intl to Pearson Intl flights
Dulles Intl to Calgary flights
Baltimore to Pierre Elliott Trudeau Intl flights
Dulles Intl to Toronto Island flights
Baltimore to Pearson Intl flights
Baltimore to Calgary flights
Reagan-National to Calgary flights
Reagan-National to Toronto Island flights
Dulles Intl to Ottawa flights
Reagan-National to Ottawa flights
Dulles Intl to Abbotsford flights
Dulles Intl to Québec City flights
Reagan-National to Abbotsford flights
Baltimore to Abbotsford flights
Reagan-National to Québec City flights
Dulles Intl to Halifax flights
Baltimore to Québec City flights
Dulles Intl to St. John's flights
Baltimore to Toronto Island flights
Reagan-National to Charlottetown flights
Baltimore to Ottawa flights
Dulles Intl to Charlottetown flights
Reagan-National to St. John's flights
Reagan-National to Halifax flights
Dulles Intl to Kelowna flights
Dulles Intl to Winnipeg flights
Baltimore to Halifax flights
Dulles Intl to Edmonton flights
Baltimore to Edmonton flights
Reagan-National to Kelowna flights
Reagan-National to Edmonton flights
Reagan-National to Winnipeg flights
Baltimore to Winnipeg flights
Baltimore to St. John's flights
Baltimore to Kelowna flights
Reagan-National to Victoria flights
Dulles Intl to Victoria flights
Baltimore to Victoria flights
Dulles Intl to Saskatoon flights
Baltimore to Charlottetown flights
Dulles Intl to Whitehorse flights
Reagan-National to Saskatoon flights
Dulles Intl to Prince George flights
Dulles Intl to Moncton flights

Top 4 airlines flying from Dulles Intl to Ontario

Discover the top 4 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 2,558,603 searches. Data last updated January 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$54Average$311FlexibilityNo cancel feeOn-time52%
Air CanadaCheapest$122Average$412FlexibilityNo cancel feeOn-time67%
Air TransatCheapest$176Average$245FlexibilityNo cancel feeOn-time50%
United AirlinesCheapest$189Average$394FlexibilityNo cancel feeOn-time69%

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