What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Ontario?

Porter Airlines, United Airlines, and Air Canada are the most popular carriers operating from Washington, D.C. Dulles Intl to Ontario

What airlines fly to Region of Ontario?

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Region of Ontario from Washington, D.C. Dulles Intl Airport according to our data. Air Canada is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 5 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Ontario?

As of August 2026, there are 5 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to Ontario.

How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Ontario?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Ontario.

What documentation or ID do you need to fly to Ontario?

The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$97 Cheap Flights from Washington, D.C. Dulles Intl Airport to Region of Ontario in 2026

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Region of Ontario on average per week?

As of August 2026, there are 307 flights per week flying from Washington, D.C. Dulles Intl Airport to Region of Ontario. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Region of Ontario on average per day?

The number of flights available between Washington, D.C. Dulles Intl Airport and Region of Ontario is 43 per day as of August 2026. The most frequent departure time is 5:00PM, with 55% of daily flights leaving in the afternoon.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:50 pm - 5:20 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$192Porter Airlines

Thu, Oct 22 - Mon, Oct 26

3:45 pm - 9:30 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

5h 45m1 stop Montreal Pierre Elliott Trudeau Intl

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$192Multiple Airlines

Wed, Oct 21 - Tue, Oct 27

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

1:40 pm - 3:10 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$193Porter Airlines

Fri, Sep 25 - Fri, Oct 2

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

3:15 pm - 4:33 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 18mnonstop

$194Air Canada

Thu, Oct 29 - Thu, Nov 5

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

3:15 pm - 4:33 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 18mnonstop

$194Air Canada

Fri, Nov 6 - Sun, Nov 8

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$199Multiple Airlines

Tue, Oct 27 - Fri, Oct 30

10:10 pm - 11:52 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 42mnonstop

7:44 pm - 9:26 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 42mnonstop

$224United Airlines

Mon, Nov 23 - Wed, Nov 25

12:39 pm - 2:25 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 46mnonstop

10:00 am - 11:45 amYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 45mnonstop

$224United Airlines

Thu, Nov 5 - Sun, Nov 8

11:20 am - 12:52 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 32mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$245Air Transat

Tue, Dec 1 - Sat, Dec 5

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

1:40 pm - 3:10 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$245Air Transat

Sat, Sep 19 - Fri, Sep 25

Cheap last minute flights

Enter your travel dates to find the best prices.

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:15 am - 10:45 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$305Porter Airlines

Sun, Aug 30 - Sat, Sep 19

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:15 am - 10:45 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$305Porter Airlines

Sun, Aug 30 - Tue, Sep 22

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:15 am - 10:45 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$314Multiple Airlines

Wed, Sep 2 - Sun, Sep 13

9:55 am - 11:21 amIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 26mnonstop

1:55 pm - 3:25 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$342Air Canada

Tue, Sep 1 - Fri, Sep 11

4:20 pm - 5:50 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 30mnonstop

1:55 pm - 3:25 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$343Air Canada

Wed, Sep 2 - Tue, Sep 15

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

1:40 pm - 3:10 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$344Multiple Airlines

Wed, Sep 2 - Tue, Sep 8

6:10 am - 11:19 amIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

5h 09m1 stop Detroit Metropolitan Wayne County

4:05 pm - 11:14 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

7h 09m1 stop Detroit Metropolitan Wayne County

$374Delta

Wed, Sep 2 - Tue, Sep 22

6:10 am - 11:19 amIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

5h 09m1 stop Detroit Metropolitan Wayne County

9:45 am - 4:30 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

6h 45m1 stop Detroit Metropolitan Wayne County

$374Delta

Tue, Sep 1 - Sat, Sep 19

12:43 pm - 2:19 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 36mnonstop

9:44 am - 11:21 amYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 37mnonstop

$382United Airlines

Wed, Sep 2 - Fri, Sep 18

12:43 pm - 2:19 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 36mnonstop

12:45 pm - 2:22 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 37mnonstop

$382United Airlines

Wed, Sep 2 - Tue, Sep 22

Cheap direct flights

Enter your travel dates to find the best prices.

3:50 pm - 5:20 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$192Porter Airlines

Thu, Oct 22 - Mon, Oct 26

11:20 am - 12:52 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 32mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$193Porter Airlines

Tue, Dec 22 - Sat, Dec 26

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

3:15 pm - 4:33 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 18mnonstop

$194Air Canada

Fri, Nov 20 - Sun, Nov 22

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

3:15 pm - 4:33 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 18mnonstop

$194Air Canada

Wed, Oct 28 - Sat, Oct 31

5:15 pm - 6:45 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$199Multiple Airlines

Tue, Oct 27 - Fri, Oct 30

5:20 pm - 6:51 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 31mnonstop

9:15 am - 10:45 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$202Multiple Airlines

Wed, Sep 16 - Sat, Sep 19

10:10 pm - 11:52 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 42mnonstop

7:44 pm - 9:26 pmYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 42mnonstop

$224United Airlines

Mon, Nov 23 - Wed, Nov 25

12:39 pm - 2:25 pmIAD Washington, D.C. Dulles Intl-YYZ Toronto Pearson Intl

1h 46mnonstop

10:00 am - 11:45 amYYZ Toronto Pearson Intl-IAD Washington, D.C. Dulles Intl

1h 45mnonstop

$224United Airlines

Thu, Nov 5 - Sun, Nov 8

11:25 am - 12:55 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 30mnonstop

1:40 pm - 3:10 pmYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 30mnonstop

$245Air Transat

Sat, Sep 19 - Fri, Sep 25

11:20 am - 12:52 pmIAD Washington, D.C. Dulles Intl-YTZ Toronto Island

1h 32mnonstop

9:10 am - 10:38 amYTZ Toronto Island-IAD Washington, D.C. Dulles Intl

1h 28mnonstop

$245Air Transat

Tue, Dec 1 - Sat, Dec 5

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Air Canada flights from Washington, D.C. Dulles Intl Airport to Region of Ontario

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to Region of Ontario flight tickets

Air Canada

Oct 29

IAD5:15 pmWashington, D.C. Dulles Intl

1h 30m

YTZ6:45 pmToronto Island

Nov 5

YTZ3:15 pmToronto Island

1h 18m

IAD4:33 pmWashington, D.C. Dulles Intl

$194

Air Canada

Nov 12

IAD9:55 amWashington, D.C. Dulles Intl

1h 27m

YYZ11:22 amToronto Pearson Intl

Nov 17

YYZ1:00 pmToronto Pearson Intl

7h 23m

1 stop

IAD8:23 pmWashington, D.C. Dulles Intl

$196

Air Canada

Nov 23

IAD9:55 amWashington, D.C. Dulles Intl

1h 27m

YYZ11:22 amToronto Pearson Intl

Nov 24

YYZ2:15 pmToronto Pearson Intl

1h 30m

IAD3:45 pmWashington, D.C. Dulles Intl

$198

United Airlines flights from Washington, D.C. Dulles Intl Airport to Region of Ontario

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Region of Ontario flight tickets

United Airlines

Sep 16

IAD10:41 pmWashington, D.C. Dulles Intl

10h 38m

1 stop

YYZ9:19 amToronto Pearson Intl

Sep 17

YYZ12:45 pmToronto Pearson Intl

1h 37m

IAD2:22 pmWashington, D.C. Dulles Intl

$231

United Airlines

Nov 6

IAD6:10 amWashington, D.C. Dulles Intl

5h 38m

1 stop

YYZ11:48 amToronto Pearson Intl

Nov 8

YYZ10:00 amToronto Pearson Intl

1h 45m

IAD11:45 amWashington, D.C. Dulles Intl

$234

United Airlines

Sep 15

IAD10:19 pmWashington, D.C. Dulles Intl

1h 35m

YYZ11:54 pmToronto Pearson Intl

Sep 23

YYZ12:45 pmToronto Pearson Intl

1h 37m

IAD2:22 pmWashington, D.C. Dulles Intl

$245

momondo Fare Finder

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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Thu 10/22

3:50 pm-5:20 pm

Nonstop1h 30m

Toronto Island

Mon 10/26

9:10 am-10:38 am

Nonstop1h 28m

$192

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Wed 10/21

3:45 pm-9:30 pm

1 stop5h 45m

Toronto Island

Tue 10/27

9:10 am-10:38 am

Nonstop1h 28m

$192

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Fri 9/25

11:25 am-12:55 pm

Nonstop1h 30m

Toronto Island

Fri 10/2

1:40 pm-3:10 pm

Nonstop1h 30m

$193

Quickest round-trip

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Thu 10/29

5:15 pm-6:45 pm

Nonstop1h 30m

Toronto Island

Thu 11/5

3:15 pm-4:33 pm

Nonstop1h 18m

$194

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Fri 11/6

5:15 pm-6:45 pm

Nonstop1h 30m

Toronto Island

Sun 11/8

3:15 pm-4:33 pm

Nonstop1h 18m

$194

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Tue 10/27

5:15 pm-6:45 pm

Nonstop1h 30m

Toronto Island

Fri 10/30

9:10 am-10:38 am

Nonstop1h 28m

$199

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Mon 11/23

10:10 pm-11:52 pm

Nonstop1h 42m

Toronto Pearson Intl

Wed 11/25

7:44 pm-9:26 pm

Nonstop1h 42m

$224

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Thu 11/5

12:39 pm-2:25 pm

Nonstop1h 46m

Toronto Pearson Intl

Sun 11/8

10:00 am-11:45 am

Nonstop1h 45m

$224

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Tue 12/1

11:20 am-12:52 pm

Nonstop1h 32m

Toronto Island

Sat 12/5

9:10 am-10:38 am

Nonstop1h 28m

$245

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Sat 9/19

11:25 am-12:55 pm

Nonstop1h 30m

Toronto Island

Fri 9/25

1:40 pm-3:10 pm

Nonstop1h 30m

$245

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Region of Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Region of Ontario?

The month of January is, on average, the cheapest month to fly to Region of Ontario from Washington, D.C. Dulles Intl Airport, with most prices found around $318. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from Washington, D.C. Dulles Intl Airport during December instead. Flights to Region of Ontario in December, while not as cheap as those in January, still average around $319.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Washington, D.C. Dulles Intl Airport. The lowest ticket price found for a Thursday departure recently was $361. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Washington, D.C. Dulles Intl Airport to Region of Ontario on a Sunday will generally be more expensive and average around $556. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Region of Ontario?

According to our data, the cheapest time of day to fly to Region of Ontario is at noon. momondo users have found flights departing from Washington, D.C. Dulles Intl Airport to Region of Ontario at noon for as low as $376. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $425.

What is the cheapest Washington, D.C. Dulles Intl to Ontario flight route?

Fly from Washington, D.C. Dulles Intl to Ottawa for the best Washington, D.C. Dulles Intl - Ontario flight prices

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Ontario?

You are more likely to see cheaper flights to Region of Ontario from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $375 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Washington, D.C. Dulles Intl Airport for as low as $294 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl Airport to Region of Ontario flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl Airport to Region of Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Region of Ontario flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Dulles Intl Airport to Region of Ontario.

Cheap Washington, D.C. Dulles Intl Airport to Region of Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Region of Ontario

Best Price Found	$97
Fastest flight time	1h 25m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from Washington, D.C. Dulles Intl Airport in the past 72 hours is $97. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Region of Ontario found on momondo in the last 72 hours is $192.

The fastest flight from Washington, D.C. Dulles Intl Airport to Region of Ontario takes 1h 25m

Direct flights go from Washington, D.C. Dulles Intl Airport to Region of Ontario every day.

There are 125 airports in Region of Ontario. From Washington, D.C. Dulles Intl Airport there are direct flights to Toronto Pearson Intl (YYZ), Toronto Island (YTZ).

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Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Ontario

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Ontario?
Prices for flights from Washington, D.C. Dulles Intl Airport to Ontario refresh daily.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Ontario?
As of August 2026, there are 5 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to Ontario.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Ontario?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Region of Ontario?
momondo data reveals that the most frequently booked plane model on the route from Washington, D.C. Dulles Intl Airport to Region of Ontario is De Havilland (Bombardier) DHC-8-400 Dash 8Q, representing 40.94% of all bookings. The subsequent popular models are Embraer 175 (Enhanced Winglets) at 16.76%, Embraer 175 at 14.24%, and Airbus A320-100/200 at 9.31%.

Best airlines flying from Washington, D.C. Dulles Intl Airport to Region of Ontario

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Region of Ontario with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $96	Free Cancellation	Rating 7.1 11,550 reviews	Search Air Canada flights
Delta	PriceFrom $106	Free Cancellation	Rating 7.8 8,540 reviews	Search Delta flights
Porter Airlines	PriceFrom $128	Free Cancellation	Rating 8.0 458 reviews	Search Porter Airlines flights
United Airlines	PriceFrom $230	Free Cancellation	Rating 7.4 10,135 reviews	Search United Airlines flights
Air Transat	PriceFrom $263	Free Cancellation	Rating 7.8 576 reviews	Search Air Transat flights

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Why should I use momondo to find a flight deal from Washington, D.C. to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to Ontario with flexible booking policies on momondo?

Flights from Washington, D.C. to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Ontario?

Once you have performed a search for Washington, D.C. to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Washington, D.C. and alert you when they change.

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Cheap flights from Washington, D.C. Dulles Intl Airport to Ontario from $97

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Ontario

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

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Big names and deals

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Air Canada flights from Washington, D.C. Dulles Intl Airport to Region of Ontario

Our best Air Canada deals on Washington, D.C. Dulles Intl Airport to Region of Ontario flight tickets

United Airlines flights from Washington, D.C. Dulles Intl Airport to Region of Ontario

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Region of Ontario flight tickets

momondo Fare Finder

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

See travel insights to Ontario from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Region of Ontario

What is the cheapest month to fly to Region of Ontario?

What is the cheapest day to depart on your flight to Region of Ontario?

What is the cheapest time of day to depart on your flight to Region of Ontario?

What is the cheapest Washington, D.C. Dulles Intl to Ontario flight route?

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Ontario?

What cabin class options are available on Washington, D.C. Dulles Intl Airport to Region of Ontario flights?

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Region of Ontario flights?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Ontario?

What airlines fly to Region of Ontario?

How many flights depart from Washington, D.C. Dulles Intl Airport to Region of Ontario on average per day?

How many flights depart from Washington, D.C. Dulles Intl Airport to Region of Ontario on average per week?

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Best airlines flying from Washington, D.C. Dulles Intl Airport to Region of Ontario

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Region of Ontario flight routes

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