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

$88 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Delta and Air Canada, with prices starting from $89 and $90, respectively.

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

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

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

On average you can expect to pay $2,297 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $102 while the most popular route, (Washington, D.C. Dulles Intl - Toronto Pearson Intl) is currently priced at $173.

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

Before booking your flight to Region of Ontario from Washington, D.C., 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 most popular airlines that fly from Washington, D.C. to Region of Ontario?

When booking a flight from Washington, D.C. to Region of Ontario, you may want to consider flying on Air Canada, Porter Airlines or United Airlines as they are the most popular for this route.

How far in advance should I book a flight from Washington, D.C. to Region of Ontario?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 53 days in advance, which can save you up to 117% on flights from Washington, D.C. to Region of Ontario compared to booking the week you need them. Waiting 53 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $342. For sooner than that we have options available in the next 3 days from $611.

What is the cheapest month to fly from Washington, D.C. to Region of Ontario?

April can be a great time to fly to Region of Ontario from Washington, D.C. with a flight ticket averaging about $302. Cheapflights users have found deals in the month of April for as cheap as $200. The most expensive prices can be found in the month of August.

Can I find deals for flights from Washington, D.C. to Ontario that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Ontario?

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

Can I find deals for business class flights from Washington, D.C. to Ontario?

Yes. Cheapflights offers flight deals from Washington, D.C. 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.

$88+ Flights from Washington, D.C. to Ontario

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Cheap flight deals from Washington, D.C. to Ontario

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$180 (United Airlines)
One-way from	$88 (Booking.com)
Popular in	August
Cheapest in	April
Average price	$325
Good round-trip deal	$218 or less
Good one-way deal	$105 or less

Provider with most accurate pricing for Washington, D.C. (WAS)-Toronto (YTO) flight deals.

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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Toronto (YTO) flights.

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From Washington, D.C. (WAS) to Ontario

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One-way flight from Washington, D.C. (WAS) to Ontario

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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Price to beat on a round-trip flight from Washington, D.C. (WAS) to Ontario.

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Price to beat on a one-way flight from Washington, D.C. (WAS) to Ontario.

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Find flight deals from Washington, D.C. to Ontario

Cheapest flights from Washington, D.C. to Ontario
Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Thu 5/292:25 pmIAD - YYZ

Nonstop1h 34mUnited Airlines

Thu 5/296:20 pmYYZ - IAD

1 stop3h 02mUnited Airlines

Deal found 3/27

$180

Mon 5/1211:35 amIAD - YTZ

Nonstop1h 33mPorter Airlines

Sun 6/88:45 amYTZ - IAD

Nonstop1h 31mPorter Airlines

Deal found 3/27

$181

Sun 6/16:00 amDCA - YYZ

1 stop4h 39mAir Canada

Sat 6/78:10 amYYZ - DCA

1 stop3h 51mAir Canada

Deal found 3/27

$184

Wed 5/146:59 amDCA - YYZ

Nonstop1h 33mMultiple Airlines

Sat 6/77:20 amYYZ - DCA

Nonstop1h 33mMultiple Airlines

Deal found 3/27

$187

Sun 5/116:22 amIAD - YYZ

1 stop5h 53mAir Canada

Sun 5/187:00 amYYZ - IAD

1 stop4h 14mAir Canada

Deal found 3/27

$188

Sun 5/1111:35 amIAD - YUL

1 stop4h 25mMultiple Airlines

Sun 5/189:15 amYUL - IAD

1 stop4h 26mMultiple Airlines

Deal found 3/27

$189

Sat 4/194:07 pmIAD - YTZ

1 stop5h 28mAir Canada

Tue 4/224:20 pmYTZ - IAD

1 stop4h 55mAir Canada

Deal found 3/26

$191

Wed 5/148:25 amIAD - YYZ

Nonstop1h 39mMultiple Airlines

Sat 6/74:00 pmYYZ - IAD

1 stop5h 04mMultiple Airlines

Deal found 3/27

$193

Thu 4/247:00 amIAD - YUL

1 stop4h 15mPorter Airlines

Sun 4/276:40 pmYUL - IAD

1 stop3h 44mPorter Airlines

Deal found 3/27

$196

Thu 6/124:20 pmIAD - YTZ

Nonstop1h 33mAir Transat

Sun 6/151:35 pmYTZ - IAD

Nonstop1h 31mAir Transat

Deal found 3/27

$202

Fri 6/274:20 pmIAD - YTZ

Nonstop1h 33mMultiple Airlines

Wed 7/21:35 pmYTZ - IAD

Nonstop1h 31mMultiple Airlines

Deal found 3/27

$204

Thu 4/246:00 amDCA - YUL

Nonstop1h 48mAir Canada

Sun 4/278:30 amYUL - DCA

Nonstop1h 49mAir Canada

Deal found 3/27

$207

Best flights from Washington, D.C. to Ontario
Discover carefully curated flight deals from Washington, D.C. to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Thu 5/292:25 pmIAD - YYZ

Nonstop1h 34mUnited Airlines

Thu 5/296:20 pmYYZ - IAD

1 stop3h 02mUnited Airlines

Deal found 3/27

$180

Mon 5/1211:35 amIAD - YTZ

Nonstop1h 33mPorter Airlines

Sun 6/88:45 amYTZ - IAD

Nonstop1h 31mPorter Airlines

Deal found 3/27

$181

Sun 6/16:00 amDCA - YYZ

1 stop4h 39mAir Canada

Sat 6/78:10 amYYZ - DCA

1 stop3h 51mAir Canada

Deal found 3/27

$184

Sun 5/1111:35 amIAD - YUL

1 stop4h 25mMultiple Airlines

Sun 5/189:15 amYUL - IAD

1 stop4h 26mMultiple Airlines

Deal found 3/27

$189

Thu 6/124:20 pmIAD - YTZ

Nonstop1h 33mAir Transat

Sun 6/151:35 pmYTZ - IAD

Nonstop1h 31mAir Transat

Deal found 3/27

$202

Tue 4/2910:10 pmDCA - YUL

1 stop11h 40mAmerican Airlines

Wed 4/3012:55 pmYUL - DCA

1 stop7h 04mAmerican Airlines

Deal found 3/27

$223

Mon 5/128:45 amDCA - YYZ

1 stop7h 25mDelta

Wed 5/142:30 pmYYZ - DCA

1 stop8h 19mDelta

Deal found 3/26

$232

Tue 6/106:00 amDCA - YYZ

1 stop6h 10mWestJet

Sun 6/1511:40 amYYZ - DCA

1 stop9h 00mWestJet

Deal found 3/26

$302

Wed 5/1411:00 amDCA - YYZ

Nonstop1h 33mUnited Airlines

Sat 5/174:30 pmYYZ - DCA

Nonstop1h 33mUnited Airlines

Deal found 3/26

$187

Sun 5/116:22 amIAD - YYZ

1 stop5h 53mAir Canada

Sun 5/187:00 amYYZ - IAD

1 stop4h 14mAir Canada

Deal found 3/27

$188

Wed 5/1411:00 amDCA - YYZ

Nonstop1h 33mMultiple Airlines

Sat 5/176:15 amYYZ - DCA

1 stop4h 04mMultiple Airlines

Deal found 3/26

$193

Thu 4/247:00 amIAD - YUL

1 stop4h 15mPorter Airlines

Sun 4/276:40 pmYUL - IAD

1 stop3h 44mPorter Airlines

Deal found 3/27

$196

Last-minute flights from Washington, D.C. to Ontario
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated March 28, 2025 and is based on user searches.

Wed 4/21:45 pmIAD - YTZ

Nonstop1h 30mAir Transat

Fri 4/118:55 pmYTZ - IAD

Nonstop1h 29mAir Transat

Deal found 3/27

$289

Thu 4/31:45 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Sat 4/126:00 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 3/27

$234

Thu 4/36:59 amDCA - YYZ

Nonstop1h 33mUnited Airlines

Mon 4/148:55 pmYYZ - DCA

Nonstop1h 33mUnited Airlines

Deal found 3/27

$279

Thu 4/33:55 pmIAD - YTZ

1 stop5h 40mAir Canada

Mon 4/144:20 pmYTZ - IAD

1 stop4h 55mAir Canada

Deal found 3/27

$283

Thu 4/36:59 amDCA - YYZ

Nonstop1h 33mAir Canada

Mon 4/146:30 amYYZ - DCA

1 stop5h 31mAir Canada

Deal found 3/27

$284

Thu 4/35:10 pmIAD - YYZ

1 stop4h 17mAir Canada

Thu 4/1010:05 amYYZ - IAD

Nonstop1h 34mAir Canada

Deal found 3/27

$284

Thu 4/36:00 amIAD - YYZ

1 stop5h 55mDelta

Sat 4/125:15 pmYYZ - IAD

1 stop5h 22mDelta

Deal found 3/27

$304

Fri 4/41:45 pmIAD - YTZ

Nonstop1h 30mMultiple Airlines

Sun 4/68:55 pmYTZ - IAD

Nonstop1h 29mMultiple Airlines

Deal found 3/27

$264

Fri 4/412:40 pmIAD - YYZ

Nonstop1h 39mUnited Airlines

Mon 4/1410:05 amYYZ - IAD

Nonstop1h 34mUnited Airlines

Deal found 3/27

$279

Sat 4/57:00 amIAD - YUL

1 stop8h 47mPorter Airlines

Wed 4/96:50 amYUL - IAD

1 stop6h 09mPorter Airlines

Deal found 3/27

$310

Mon 4/73:13 pmBWI - YYZ

1 stop28h 17mMultiple Airlines

Sat 4/128:15 pmYYZ - BWI

1 stop17h 32mMultiple Airlines

Deal found 3/26

$232

Mon 4/712:00 pmBWI - YYZ

1 stop5h 02mDelta

Mon 5/56:10 pmYYZ - BWI

1 stop6h 31mDelta

Deal found 3/27

$297

One-way flights from Washington, D.C. to Ontario
Search for one-way flight options from Washington, D.C. to Ontario. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Fri 5/164:20 pmIAD - YTZ

Nonstop1h 33mPorter Airlines

Deal found 3/27

$88

Wed 4/166:25 amDCA - YYZ

1 stop4h 55mDelta

Deal found 3/26

$89

Tue 4/1510:19 pmIAD - YYZ

Nonstop1h 35mAir Canada

Deal found 3/26

$90

Fri 6/1312:55 pmDCA - YOW

Nonstop1h 32mAir Canada

Deal found 3/27

$91

Wed 4/96:59 amDCA - YYZ

Nonstop1h 33mAir Canada

Deal found 3/26

$91

Sun 4/137:00 amIAD - YTZ

Nonstop1h 30mAir Transat

Deal found 3/27

$96

Tue 4/156:40 pmDCA - YYZ

Nonstop1h 33mUnited Airlines

Deal found 3/26

$96

Tue 4/158:25 amIAD - YYZ

Nonstop1h 39mUnited Airlines

Deal found 3/27

$96

Tue 4/89:20 pmBWI - YYZ

1 stop14h 25mMultiple Airlines

Deal found 3/27

$97

Fri 4/186:50 pmBWI - YYZ

1 stop5h 06mDelta

Deal found 3/27

$100

Sat 4/1910:14 pmIAD - YOW

Nonstop1h 39mAir Canada

Deal found 3/27

$102

Fri 5/308:18 amIAD - YTZ

1 stop10h 19mAir Canada

Deal found 3/27

$102

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Thu 5/29

2:25 pm-3:59 pm

Nonstop1h 34m

Toronto Pearson Intl

Thu 5/29

6:20 pm-9:22 pm

1 stop3h 02m

$180

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Mon 5/12

11:35 am-1:08 pm

Nonstop1h 33m

Toronto Island

Sun 6/8

8:45 am-10:16 am

Nonstop1h 31m

$181

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Sun 6/1

6:00 am-10:39 am

1 stop4h 39m

Toronto Pearson Intl

Sat 6/7

8:10 am-12:01 pm

1 stop3h 51m

$184

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Wed 5/14

6:59 am-8:32 am

Nonstop1h 33m

Toronto Pearson Intl

Sat 6/7

7:20 am-8:53 am

Nonstop1h 33m

$187

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Sun 5/11

6:22 am-12:15 pm

1 stop5h 53m

Toronto Pearson Intl

Sun 5/18

7:00 am-11:14 am

1 stop4h 14m

$188

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Sun 5/11

11:35 am-4:00 pm

1 stop4h 25m

Montreal Pierre Elliott Trudeau Intl

Sun 5/18

9:15 am-1:41 pm

1 stop4h 26m

$189

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sat 4/19

4:07 pm-9:35 pm

1 stop5h 28m

Toronto Island

Tue 4/22

4:20 pm-9:15 pm

1 stop4h 55m

$191

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 5/14

8:25 am-10:04 am

Nonstop1h 39m

Toronto Pearson Intl

Sat 6/7

4:00 pm-9:04 pm

1 stop5h 04m

$193

Washington, D.C.Montreal

IAD - YUL

IADYUL

Washington, D.C. Dulles Intl

Thu 4/24

7:00 am-11:15 am

1 stop4h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 4/27

6:40 pm-10:24 pm

1 stop3h 44m

$196

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 6/12

4:20 pm-5:53 pm

Nonstop1h 33m

Toronto Island

Sun 6/15

1:35 pm-3:06 pm

Nonstop1h 31m

$202

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 60 results

...

Best time to book a flight from Washington, D.C. to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Washington, D.C. 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. to Ontario

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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $243). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of $359). 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 WAS to ON?

When flying from Washington, D.C. to Region of Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

The most flights from WAS to CAON are scheduled on a Wednesday (29 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Ontario by month

In terms of precipitation, rainfall in Region of Ontario ranges from 2.0 - 3.3 inches per month. June is typically the wettest month, when rainfall can reach 3.3 in. February is typically the driest time to visit Region of Ontario when rainfall is around 2.0 in.

Temperature in Ontario 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Ontario

See what other customers who have flown with Delta, Porter Airlines and Air Transat from Washington, D.C. to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,897 reviews

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

7,897 reviews

Delta

8.0

Very good

7,897 reviews

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

7,897 reviews

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

7,897 reviews

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

8,603 reviews

Delta

8.0

Very good

7,897 reviews

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.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,897 reviews

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

What are the cheapest airlines to fly from Washington, D.C. to Region of Ontario one-way?
$88 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Delta and Air Canada, with prices starting from $89 and $90, respectively.
What are the most popular routes from Washington, D.C. to Region of Ontario?
The most popular flight routes from Washington, D.C. to Region of Ontario are Washington, D.C. Dulles Intl - Toronto Pearson Intl, Washington, D.C. Reagan-National - Toronto Pearson Intl and Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl.
What are the most reliable airlines from Washington, D.C. to Region of Ontario?
Before booking your flight to Region of Ontario from Washington, D.C., 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. to Region of Ontario?
On average you can expect to pay $2,297 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $102 while the most popular route, (Washington, D.C. Dulles Intl - Toronto Pearson Intl) is currently priced at $173.
Can I find deals for flights from Washington, D.C. to Ontario that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Ontario.
Can I find deals for business class flights from Washington, D.C. to Ontario?
Yes. Cheapflights offers flight deals from Washington, D.C. 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. to Region of Ontario?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $243). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of $359). 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

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Washington, D.C. to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$114	Average$395	FlexibilityNo cancel fee	On-time67%
Porter Airlines	Cheapest$125	Average$336	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$140	Average$490	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$145	Average$352	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$242	Average$432	FlexibilityNo cancel fee	On-timeN/A
Air Transat	Cheapest$250	Average$347	FlexibilityNo cancel fee	On-time50%
WestJet	Cheapest$278	Average$455	FlexibilityNo cancel fee	On-time60%

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$88+ Cheap flights from Washington, D.C. (WAS) 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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Ontario with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Washington, D.C. to Ontario

Keep the following information in mind while searching for Washington, D.C. to Ontario flight deals. Data was last updated March 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Washington, D.C. to Ontario

Cheapest flights from Washington, D.C. to OntarioExplore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Washington, D.C. to Ontario

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Washington, D.C. 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 March 28, 2025.

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

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

See what other customers who have flown with Delta, Porter Airlines and Air Transat from Washington, D.C. to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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. to Region of Ontario one-way?

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

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

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

Can I find deals for flights from Washington, D.C. to Ontario that include hotel bookings?

How can I find direct flights from Washington, D.C. to Ontario?

Can I find deals for business class flights from Washington, D.C. to Ontario?

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

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Alternative routes for Washington, D.C. to Ontario

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Top 7 airlines flying from Washington, D.C. to Ontario

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Cheapest flights from Washington, D.C. to Ontario
Explore the most affordable flight options available from Washington, D.C. to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.