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

The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $113. However, be on the lookout for offers from United Airlines and Air Transat, as they are both options that can get you from Region of Ontario to Washington, D.C. for a low price.

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

Most travelers choose Toronto Pearson Intl - Washington, D.C. Dulles Intl, Toronto Pearson Intl - Washington, D.C. Reagan-National or Toronto Island - Washington, D.C. Dulles Intl when deciding on the best route from Region of Ontario to Washington, D.C..

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

On average you can expect to pay $968 for a flight from Region of Ontario to Washington, D.C.. The cheapest flight overall is $122 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at $152.

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

The top 3 most reliable airlines when flying from Region of Ontario to Washington, D.C. are Avianca (81%), Copa Airlines (81%) and ANA (81%).

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

Before booking your flight from Region of Ontario to Washington, D.C. check out the most popular airlines for this route: Air Canada, Porter Airlines or United Airlines.

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

To save up to 107% on this flight, we recommend booking at least 28 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Region of Ontario to Washington, D.C. from $303 1-2 weeks out and tickets from $477 for flights departing within the next 72 hours.

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

The best pricing can be found in the month of April. Prices to Washington, D.C. from Region of Ontario average $262. You can even find prices in April for less than $262, as users have found deals to Washington, D.C. from as low as $142. The month of August appears to be one of the more expensive times to travel to Washington, D.C. from Region of Ontario. Flying in the targeted month can save you up to 7%.

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

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

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

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

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

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

$113+ Flights from Ontario to Washington, D.C.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$178 (FlightHub)
One-way from	$113 (Air Canada)
Popular in	August
Cheapest in	April
Average price	$268
Good round-trip deal	$183 or less
Good one-way deal	$109 or less

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

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

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

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

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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).

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Cheapest flight prices on average. 0% potential price decrease ($2 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 Ontario to Washington, D.C. (WAS).

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

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

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

Sun 4/137:20 amYYZ - DCA

Nonstop1h 33mAir Canada

Wed 4/166:59 amDCA - YYZ

Nonstop1h 33mAir Canada

Deal found 3/26

$178

Mon 4/148:55 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Thu 4/177:00 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Deal found 3/27

$178

Sat 5/39:00 amYYZ - IAD

1 stop4h 14mAir Canada

Sun 5/410:19 pmIAD - YYZ

Nonstop1h 35mAir Canada

Deal found 3/26

$178

Sat 5/1010:20 amYTZ - IAD

2 stops10h 48mAir Canada

Sat 5/173:18 pmIAD - YTZ

1 stop6h 17mAir Canada

Deal found 3/26

$182

Wed 4/2310:25 amYTZ - DCA

1 stop4h 59mAir Canada

Mon 4/286:00 amDCA - YTZ

1 stop5h 47mAir Canada

Deal found 3/27

$183

Tue 5/64:00 pmYYZ - IAD

1 stop5h 07mUnited Airlines

Wed 5/712:45 pmIAD - YYZ

1 stop4h 18mUnited Airlines

Deal found 3/26

$184

Sun 5/258:45 amYTZ - IAD

Nonstop1h 31mAir Transat

Thu 6/1211:35 amIAD - YTZ

Nonstop1h 33mAir Transat

Deal found 3/26

$186

Sat 5/1010:25 amYTZ - IAD

1 stop5h 54mMultiple Airlines

Sat 5/174:20 pmIAD - YTZ

Nonstop1h 33mMultiple Airlines

Deal found 3/26

$187

Thu 4/248:55 pmYYZ - DCA

Nonstop1h 33mUnited Airlines

Mon 4/289:40 amDCA - YYZ

Nonstop1h 33mUnited Airlines

Deal found 3/26

$189

Thu 4/2412:45 pmYYZ - IAD

Nonstop1h 34mMultiple Airlines

Sun 4/273:55 pmIAD - YYZ

1 stop4h 48mMultiple Airlines

Deal found 3/26

$189

Thu 4/247:30 amYYZ - DCA

1 stop5h 06mMultiple Airlines

Sun 4/276:00 amDCA - YYZ

1 stop4h 39mMultiple Airlines

Deal found 3/26

$194

Thu 4/246:00 amYYZ - IAD

1 stop7h 02mDelta

Sun 4/276:00 amIAD - YYZ

1 stop5h 25mDelta

Deal found 3/26

$208

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

Mon 4/148:55 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Thu 4/177:00 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Deal found 3/27

$178

Fri 4/2512:45 pmYYZ - IAD

Nonstop1h 34mAir Canada

Fri 5/212:40 pmIAD - YYZ

Nonstop1h 39mAir Canada

Deal found 3/26

$178

Tue 5/68:35 amYYZ - IAD

1 stop5h 53mUnited Airlines

Sun 5/1112:50 pmIAD - YYZ

1 stop4h 13mUnited Airlines

Deal found 3/27

$184

Sun 5/258:45 amYTZ - IAD

Nonstop1h 31mAir Transat

Thu 6/1211:35 amIAD - YTZ

Nonstop1h 33mAir Transat

Deal found 3/26

$186

Sat 5/1010:25 amYTZ - IAD

1 stop5h 54mMultiple Airlines

Sat 5/174:20 pmIAD - YTZ

Nonstop1h 33mMultiple Airlines

Deal found 3/26

$187

Thu 4/246:00 amYYZ - IAD

1 stop7h 02mDelta

Sun 4/276:00 amIAD - YYZ

1 stop5h 25mDelta

Deal found 3/27

$208

Tue 4/155:25 pmYYZ - DCA

Nonstop1h 45mAmerican Airlines

Sat 4/1910:10 amDCA - YYZ

Nonstop1h 45mAmerican Airlines

Deal found 3/27

$209

Fri 5/306:05 pmYYZ - IAD

1 stop4h 49mWestJet

Mon 6/23:37 pmIAD - YYZ

1 stop6h 19mWestJet

Deal found 3/27

$271

Sun 5/117:20 amYYZ - DCA

Nonstop1h 33mAir Canada

Sun 5/186:59 amDCA - YYZ

Nonstop1h 33mAir Canada

Deal found 3/27

$179

Wed 4/237:20 amYYZ - DCA

Nonstop1h 33mMultiple Airlines

Wed 4/306:00 amDCA - YYZ

1 stop6h 39mMultiple Airlines

Deal found 3/26

$189

Sat 5/1010:20 amYTZ - IAD

2 stops10h 48mAir Canada

Sat 5/173:18 pmIAD - YTZ

1 stop6h 17mAir Canada

Deal found 3/26

$182

Wed 4/2310:25 amYTZ - DCA

1 stop4h 59mAir Canada

Mon 4/286:00 amDCA - YTZ

1 stop5h 47mAir Canada

Deal found 3/27

$183

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

Tue 4/15:25 pmYYZ - DCA

Nonstop1h 45mAmerican Airlines

Sat 4/52:55 pmDCA - YYZ

Nonstop1h 40mAmerican Airlines

Deal found 3/26

$252

Tue 4/111:30 amYTZ - IAD

Nonstop1h 29mAir Transat

Wed 4/27:00 amIAD - YTZ

Nonstop1h 30mAir Transat

Deal found 3/26

$260

Wed 4/23:00 pmYYZ - DCA

1 stop6h 41mUnited Airlines

Thu 4/36:59 amDCA - YYZ

Nonstop1h 33mUnited Airlines

Deal found 3/25

$240

Thu 4/38:55 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Wed 4/167:00 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Deal found 3/27

$181

Thu 4/36:49 pmYYZ - IAD

1 stop4h 11mDelta

Wed 4/169:20 amIAD - YYZ

1 stop5h 49mDelta

Deal found 3/27

$257

Sat 4/53:25 pmYTZ - DCA

1 stop5h 43mAir Canada

Wed 4/912:55 pmDCA - YTZ

1 stop5h 42mAir Canada

Deal found 3/25

$205

Sat 4/57:20 amYYZ - DCA

Nonstop1h 33mAir Canada

Wed 4/96:59 amDCA - YYZ

Nonstop1h 33mAir Canada

Deal found 3/25

$207

Sat 4/512:20 pmYYZ - IAD

1 stop4h 08mUnited Airlines

Wed 4/98:25 amIAD - YYZ

1 stop5h 22mUnited Airlines

Deal found 3/26

$251

Sun 4/68:55 pmYTZ - IAD

Nonstop1h 29mMultiple Airlines

Sun 4/207:00 amIAD - YTZ

Nonstop1h 30mMultiple Airlines

Deal found 3/27

$206

Sun 4/68:15 amYYZ - IAD

Nonstop1h 31mAir Canada

Sun 4/208:25 amIAD - YYZ

Nonstop1h 39mAir Canada

Deal found 3/27

$206

Sun 4/68:25 amYTZ - IAD

1 stop4h 47mAir Canada

Sun 4/204:07 pmIAD - YTZ

1 stop5h 28mAir Canada

Deal found 3/27

$210

Sun 4/66:00 amYYZ - BWI

1 stop5h 41mDelta

Sun 4/206:00 amBWI - YYZ

1 stop5h 59mDelta

Deal found 3/27

$253

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

Sat 5/178:25 amYTZ - IAD

1 stop4h 49mAir Canada

Deal found 3/27

$113

Tue 5/207:15 amYYZ - DCA

2 stops8h 34mAir Canada

Deal found 3/27

$114

Wed 5/217:20 amYYZ - DCA

Nonstop1h 33mUnited Airlines

Deal found 3/27

$119

Wed 5/74:00 pmYYZ - IAD

1 stop5h 13mAir Canada

Deal found 3/27

$119

Sat 4/126:00 pmYTZ - IAD

Nonstop1h 29mAir Transat

Deal found 3/27

$124

Wed 5/147:30 amYYZ - IAD

1 stop6h 58mUnited Airlines

Deal found 3/26

$125

Mon 5/52:30 pmYYZ - DCA

1 stop4h 12mDelta

Deal found 3/26

$131

Sun 4/611:10 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 3/27

$131

Mon 5/196:03 amYYZ - IAD

1 stop5h 42mDelta

Deal found 3/26

$131

Sun 6/88:25 pmYTZ - DCA

1 stop13h 54mAir Canada

Deal found 3/27

$132

Mon 4/142:55 pmYYZ - BWI

1 stop19h 42mMultiple Airlines

Deal found 3/27

$136

Mon 5/1911:05 amYYZ - DCA

Nonstop1h 35mAmerican Airlines

Deal found 3/27

$136

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

TorontoWashington, D.C.

YYZ - DCA

YYZDCA

Toronto Pearson Intl

Sun 4/13

7:20 am-8:53 am

Nonstop1h 33m

Washington, D.C. Reagan-National

Wed 4/16

6:59 am-8:32 am

Nonstop1h 33m

$178

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Mon 4/14

8:55 pm-10:24 pm

Nonstop1h 29m

Washington, D.C. Dulles Intl

Thu 4/17

7:00 am-8:30 am

Nonstop1h 30m

$178

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Sat 5/3

2:30 pm-4:08 pm

Nonstop1h 38m

Washington, D.C. Dulles Intl

Sun 5/4

10:19 pm-11:54 pm

Nonstop1h 35m

$178

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 5/10

10:20 am-9:08 pm

2 stops10h 48m

Washington, D.C. Dulles Intl

Sat 5/17

3:18 pm-9:35 pm

1 stop6h 17m

$182

TorontoWashington, D.C.

YTZ - DCA

YTZDCA

Toronto Island

Wed 4/23

10:25 am-3:24 pm

1 stop4h 59m

Washington, D.C. Reagan-National

Mon 4/28

6:00 am-11:47 am

1 stop5h 47m

$183

TorontoWashington, D.C.

YYZ - IAD

YYZIAD

Toronto Pearson Intl

Tue 5/6

4:00 pm-9:07 pm

1 stop5h 07m

Washington, D.C. Dulles Intl

Wed 5/7

12:45 pm-5:03 pm

1 stop4h 18m

$184

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sun 5/25

8:45 am-10:16 am

Nonstop1h 31m

Washington, D.C. Dulles Intl

Thu 6/12

11:35 am-1:08 pm

Nonstop1h 33m

$186

TorontoWashington, D.C.

YTZ - IAD

YTZIAD

Toronto Island

Sat 5/10

10:25 am-4:19 pm

1 stop5h 54m

Washington, D.C. Dulles Intl

Sat 5/17

4:20 pm-5:53 pm

Nonstop1h 33m

$187

TorontoWashington, D.C.

YYZ - DCA

YYZDCA

Toronto Pearson Intl

Thu 4/24

8:55 pm-10:28 pm

Nonstop1h 33m

Washington, D.C. Reagan-National

Mon 4/28

9:40 am-11:13 am

Nonstop1h 33m

$189

TorontoWashington, D.C.

YYZ - DCA

YYZDCA

Toronto Pearson Intl

Thu 4/24

7:30 am-12:36 pm

1 stop5h 06m

Washington, D.C. Reagan-National

Sun 4/27

6:00 am-10:39 am

1 stop4h 39m

$194

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 Ontario to Washington, D.C.

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

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

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of $309). Flying from Region of Ontario to Washington, D.C. in June is currently the most expensive (average of $385). 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 WAS?

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

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

The most flights from CAON to WAS are scheduled on a Friday (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 Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

Peruse reviews from past customers who have flown with Alaska Airlines, Delta and Porter Airlines from Ontario to Washington, D.C. to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,798 reviews

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,896 reviews

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Porter Airlines

7.9

Good

276 reviews

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Air Transat

7.8

Good

381 reviews

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Copa Airlines

7.5

Good

1,395 reviews

Alaska Airlines

8.0

Very good

9,798 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to Washington, D.C. one-way?
The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $113. However, be on the lookout for offers from United Airlines and Air Transat, as they are both options that can get you from Region of Ontario to Washington, D.C. for a low price.
What are the most popular routes from Region of Ontario to Washington, D.C.?
Most travelers choose Toronto Pearson Intl - Washington, D.C. Dulles Intl, Toronto Pearson Intl - Washington, D.C. Reagan-National or Toronto Island - Washington, D.C. Dulles Intl when deciding on the best route from Region of Ontario to Washington, D.C..
What are the most reliable airlines from Region of Ontario to Washington, D.C.?
The top 3 most reliable airlines when flying from Region of Ontario to Washington, D.C. are Avianca (81%), Copa Airlines (81%) and ANA (81%).
What are the cheapest flights from Region of Ontario to Washington, D.C.?
On average you can expect to pay $968 for a flight from Region of Ontario to Washington, D.C.. The cheapest flight overall is $122 while the most popular route, (Toronto Pearson Intl - Washington, D.C. Dulles Intl) is currently priced at $152.
Can I find deals for flights from Ontario to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Ontario to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington, D.C..
Can I find deals for business class flights from Ontario to Washington, D.C.?
Yes. Cheapflights offers flight deals from Ontario to Washington, D.C. 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.?
Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Washington, D.C. (average of $309). Flying from Region of Ontario to Washington, D.C. in June is currently the most expensive (average of $385). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Woodbridge

Gaithersburg

Fredericksburg

Linthicum Heights

Silver Spring

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Ontario to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Porter Airlines	Cheapest$174	Average$343	FlexibilityNo cancel fee	On-time52%
Air Canada	Cheapest$185	Average$338	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$214	Average$354	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$219	Average$303	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$221	Average$280	FlexibilityNo cancel fee	On-timeN/A
WestJet	Cheapest$290	Average$400	FlexibilityNo cancel fee	On-time60%

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$113+ Cheap flights from Ontario to Washington, D.C. (WAS)

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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.

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

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3. Compare prices and book

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

Keep the following information in mind while searching for Ontario to Washington, D.C. 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 Ontario to Washington, D.C.

Cheapest flights from Ontario to Washington, D.C.Explore the most affordable flight options available from Ontario to Washington, D.C.. 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 Ontario to Washington, D.C.. 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 Ontario to Washington, D.C. that are best for you.

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

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

Cheapflights Insights

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

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

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

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

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

Peruse reviews from past customers who have flown with Alaska Airlines, Delta and Porter Airlines from Ontario to Washington, D.C. to help guide your decision. You can also see how each airline compares 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 Ontario to Washington, D.C.. 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 Region of Ontario to Washington, D.C. one-way?

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

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

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

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

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

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

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

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Alternative routes for Ontario to Washington, D.C.

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Top 6 airlines flying from Ontario to Washington, D.C.

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