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

A quick flight from Washington, D.C. to Region of Ontario can take about 1h 32m. Porter Airlines provides one of the quickest options available for as low as $194. The distance from Washington, D.C. to Region of Ontario is about 339 mi. This flight may include one or multiple stops.

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

$82 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 Air Canada and United Airlines, with prices starting from $88 and $96, respectively.

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.

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).

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. Reagan-National - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl and Washington, D.C. Dulles Intl - Toronto Pearson Intl.

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

On average you can expect to pay $2,379 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $96 while the most popular route, (Washington, D.C. Reagan-National - Montreal Pierre Elliott Trudeau Intl) is currently priced at $301.

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 (80%), Air Canada (71%), Copa Airlines( 70%).

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.

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.

$96+ Cheap Flights from Washington, D.C. to Ontario

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

Cheapest

Best

Last-minute

One-way

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 September 11, 2026.

Mon 11/2311:20 am -

Nonstop1h 32m

Mon 11/304:15 pm -

Nonstop1h 28m

Deal found 9/10

$194

Thu 10/156:00 am -

1 stop4h 33m

Mon 10/198:00 am -

1 stop4h 09m

Deal found 9/6

$194

Tue 11/2411:20 am -

Nonstop1h 32m

Sat 11/289:10 am -

Nonstop1h 28m

Deal found 9/10

$195

Thu 10/296:55 pm -

Nonstop1h 33m

Sun 11/18:05 am -

1 stop4h 14m

Deal found 9/10

$195

Sat 10/2411:25 am -

Nonstop1h 30m

Sat 10/319:10 am -

Nonstop1h 28m

Deal found 9/6

$196

Thu 10/296:55 pm -

Nonstop1h 33m

Thu 11/56:20 pm -

Nonstop1h 38m

Deal found 9/9

$196

Tue 12/19:55 am -

Nonstop1h 27m

Sat 12/56:40 pm -

Nonstop1h 30m

Deal found 9/9

$196

Sat 10/2412:50 pm -

1 stop5h 30m

Sat 10/318:20 am -

1 stop3h 59m

Deal found 9/8

$196

Fri 9/253:50 pm -

Nonstop1h 30m

Sun 9/279:15 am -

Nonstop1h 30m

Deal found 9/5

$197

Fri 11/276:25 pm -

Nonstop1h 34m

Sun 11/299:10 am -

Nonstop1h 28m

Deal found 9/10

$198

Thu 10/2912:55 pm -

1 stop5h 24m

Thu 11/58:20 am -

1 stop3h 59m

Deal found 9/9

$198

Wed 11/2511:20 am -

Nonstop1h 32m

Thu 11/269:10 am -

Nonstop1h 28m

Deal found 9/10

$199

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 September 11, 2026.

Thu 11/1211:20 am -

Nonstop1h 32m

Sun 11/154:15 pm -

Nonstop1h 28m

Deal found 9/5

$194

Fri 11/2711:05 am -

1 stop4h 51m

Tue 12/18:20 am -

1 stop3h 59m

Deal found 9/9

$201

Tue 11/246:10 am -

1 stop5h 09m

Tue 12/16:00 pm -

1 stop4h 24m

Deal found 9/10

$249

Tue 10/135:50 pm -

1 stop4h 33m

Thu 10/1510:30 am -

1 stop4h 27m

Deal found 9/9

$307

Tue 9/2911:25 am -

Nonstop1h 30m

Sun 10/49:15 am -

Nonstop1h 30m

Deal found 9/7

$218

Tue 9/2212:55 pm -

1 stop5h 25m

Fri 9/258:20 am -

1 stop3h 54m

Deal found 9/8

$221

Mon 11/1612:55 pm -

1 stop5h 24m

Sat 11/218:20 am -

1 stop3h 59m

Deal found 9/5

$224

Wed 11/256:00 am -

1 stop7h 30m

Wed 12/29:45 am -

1 stop6h 33m

Deal found 9/10

$249

Mon 11/231:19 pm -

Nonstop1h 57m

Sat 11/289:15 am -

Nonstop2h 13m

Deal found 9/6

$498

Fri 9/253:50 pm -

Nonstop1h 30m

Tue 9/299:15 am -

Nonstop1h 30m

Deal found 9/6

$231

Mon 10/512:50 pm -

1 stop5h 30m

Wed 10/78:20 am -

1 stop3h 49m

Deal found 9/5

$224

Wed 10/286:32 pm -

1 stop4h 57m

Fri 10/309:40 am -

1 stop7h 02m

Deal found 9/9

$249

Thu 11/2611:20 am -

Nonstop1h 32m

Mon 11/309:10 am -

Nonstop1h 28m

Deal found 9/6

$231

Fri 11/2712:55 pm -

1 stop5h 24m

Sat 11/288:20 am -

1 stop3h 59m

Deal found 9/10

$226

Tue 10/66:10 am -

1 stop5h 09m

Tue 10/139:40 am -

1 stop8h 57m

Deal found 9/8

$260

Sat 10/1711:25 am -

Nonstop1h 30m

Tue 10/209:15 am -

Nonstop1h 30m

Deal found 9/9

$244

Tue 11/311:05 am -

1 stop4h 51m

Tue 11/108:20 am -

1 stop3h 59m

Deal found 9/6

$227

Thu 10/158:30 am -

1 stop5h 12m

Mon 10/197:10 am -

1 stop4h 59m

Deal found 9/6

$340

Sun 10/1111:00 am -

1 stop7h 09m

Tue 10/1310:04 am -

1 stop8h 32m

Deal found 9/9

$260

Fri 9/255:50 pm -

1 stop4h 33m

Wed 9/301:55 pm -

Nonstop1h 30m

Deal found 9/7

$341

Thu 9/249:40 am -

1 stop7h 40m

Wed 9/306:10 pm -

1 stop4h 52m

Deal found 9/9

$260

Wed 10/1412:50 pm -

1 stop5h 30m

Wed 10/218:20 am -

1 stop3h 49m

Deal found 9/10

$237

Thu 10/83:50 pm -

Nonstop1h 30m

Sun 10/119:15 am -

Nonstop1h 30m

Deal found 9/5

$274

Thu 9/246:10 am -

1 stop7h 24m

Mon 9/284:05 pm -

1 stop7h 09m

Deal found 9/8

$260

Thu 10/111:25 am -

1 stop6h 27m

Sun 10/46:25 pm -

1 stop16h 20m

Deal found 9/9

$347

Sat 9/269:40 am -

1 stop5h 35m

Mon 9/284:05 pm -

1 stop6h 57m

Deal found 9/6

$269

Mon 10/1211:25 am -

Nonstop1h 30m

Thu 10/221:40 pm -

Nonstop1h 30m

Deal found 9/10

$298

Fri 10/96:45 am -

1 stop9h 25m

Wed 10/142:20 pm -

Nonstop1h 58m

Deal found 9/9

$508

Thu 11/1211:05 am -

1 stop6h 09m

Sun 11/156:10 pm -

1 stop5h 16m

Deal found 9/5

$269

Tue 10/2010:30 am -

1 stop6h 18m

Tue 10/2710:20 am -

2 stops10h 03m

Deal found 9/7

$395

Last-minute flights from Washington, D.C. to Ontario
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated September 11, 2026 and is based on user searches.

Thu 9/243:50 pm -

Nonstop1h 30m

Sun 9/279:15 am -

Nonstop1h 30m

Deal found 9/6

$198

Fri 9/253:50 pm -

Nonstop1h 30m

Sun 9/279:15 am -

Nonstop1h 30m

Deal found 9/5

$197

Mon 9/289:45 am -

1 stop6h 05m

Fri 10/29:30 am -

1 stop5h 30m

Deal found 9/6

$194

Mon 9/289:55 am -

Nonstop1h 25m

Fri 10/21:00 pm -

1 stop6h 00m

Deal found 9/6

$199

Tue 9/2911:25 am -

Nonstop1h 30m

Thu 10/89:15 am -

Nonstop1h 30m

Deal found 9/9

$199

Thu 10/156:00 am -

1 stop4h 33m

Mon 10/198:00 am -

1 stop4h 09m

Deal found 9/6

$194

Sat 10/2411:25 am -

Nonstop1h 30m

Sat 10/319:10 am -

Nonstop1h 28m

Deal found 9/6

$196

Sat 10/2412:50 pm -

1 stop5h 30m

Sat 10/318:20 am -

1 stop3h 59m

Deal found 9/8

$196

Sun 10/2511:20 am -

Nonstop1h 32m

Sat 10/319:10 am -

Nonstop1h 28m

Deal found 9/6

$195

Wed 10/289:55 am -

Nonstop1h 27m

Fri 10/306:40 pm -

Nonstop1h 30m

Deal found 9/9

$196

Thu 10/296:55 pm -

Nonstop1h 33m

Sun 11/18:05 am -

1 stop4h 14m

Deal found 9/10

$195

Thu 10/2912:55 pm -

1 stop5h 24m

Thu 11/58:20 am -

1 stop3h 59m

Deal found 9/9

$198

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 September 11, 2026.

Sat 10/1012:50 pm -

1 stop4h 17m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/10

$96

Mon 11/25:13 pm -

1 stop5h 43m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/9

$96

Sun 9/2712:55 pm -

1 stop5h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/9

$96

Tue 9/225:20 pm -

Nonstop1h 31m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$97

Tue 9/223:00 pm -

Nonstop1h 45m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$97

Tue 9/229:55 am -

Nonstop1h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/7

$97

Sun 10/1112:50 pm -

1 stop5h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$97

Wed 10/216:59 am -

Nonstop1h 36m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/5

$98

Tue 10/64:00 pm -

Nonstop1h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/5

$98

Wed 10/2112:50 pm -

1 stop5h 30m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/5

$98

Sun 11/89:55 am -

2 stops8h 24m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$99

Sat 10/34:20 pm -

2 stops6h 52m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/6

$99

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$194 (Kiwi.com)
One-way from	$96 (Air Canada)
Popular in	May
Cheapest in	January
Average price	$286
Good round-trip deal	$193 or less
Good one-way deal	$120 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. (WAS) to Ontario

Search Deals

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

Search Deals

Highest demand for flights based on searches. 2% potential increase in price ($9 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

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

Search Deals

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

Search Deals

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

Cheapest round-trip

Quickest round-trip

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Tue 10/6

4:00 pm-5:25 pm

Nonstop1h 25m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$98

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Thu 9/24

6:10 am-1:34 pm

1 stop7h 24m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Mon 10/26

7:20 pm-11:36 pm

1 stop4h 16m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Thu 10/8

6:10 am-1:36 pm

1 stop7h 26m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YYZ Toronto Pearson Intl

DCAYYZ

Washington, D.C. Reagan-National

Fri 10/2

8:25 am-4:13 pm

1 stop7h 48m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Thu 9/24

6:10 am-1:34 pm

1 stop7h 24m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Tue 10/6

6:05 am-11:19 am

1 stop5h 14m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

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

IADYYZ

Washington, D.C. Dulles Intl

Thu 10/1

6:10 am-1:34 pm

1 stop7h 24m

Toronto Pearson Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$101

Washington, D.C.Toronto

DCA Washington, D.C. Reagan-National - YTZ Toronto Island

DCAYTZ

Washington, D.C. Reagan-National

Tue 9/22

12:55 pm-6:20 pm

1 stop5h 25m

Toronto Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$102

Washington, D.C.Toronto

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

IADYTZ

Washington, D.C. Dulles Intl

Tue 9/22

9:45 am-2:20 pm

1 stop4h 35m

Toronto Island

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/5

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

IAD-YTZ

DCA-YYZ

IAD-YYZ

DCA-YTZ

IAD-YUL

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

WAS-CAON

IAD-YTZ

DCA-YYZ

IAD-YYZ

DCA-YTZ

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 $310). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of $369). 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?

It’s optimal to fly from Washington, D.C. to Region of Ontario at noon. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the morning.

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

The most flights from WAS to CAON are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to Region of Ontario flights typically cost between $258 and $468 in October.
The cheapest round-trip price found within the last 5 days was $194 on Air Canada (Oct 15-Oct 19).

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Region of Ontario, you should look to book at least 61 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

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

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Washington, D.C. to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Porter Airlines

8.0

Very good

460 reviews

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Air Transat

7.7

Good

579 reviews

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

United Airlines

7.4

Good

10,197 reviews

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

American Airlines

7.1

Good

12,047 reviews

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Air Canada

7.1

Good

11,611 reviews

Porter Airlines

8.0

Very good

460 reviews

Reviews

1 / 20

6.0

Good

Shannon,Jul 2026

YQT - YOW

Seats need to be a bit bigger & I'm not impressed that you have to pay to change seats

Related info for your journey

How long is the flight from Washington, D.C. to Region of Ontario?
A quick flight from Washington, D.C. to Region of Ontario can take about 1h 32m. Porter Airlines provides one of the quickest options available for as low as $194. The distance from Washington, D.C. to Region of Ontario is about 339 mi. This flight may include one or multiple stops.
What are the cheapest airlines to fly from Washington, D.C. to Region of Ontario one-way?
$82 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 Air Canada and United Airlines, with prices starting from $88 and $96, 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. Reagan-National - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl and Washington, D.C. Dulles Intl - Toronto Pearson 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 (80%), Air Canada (71%), Copa Airlines( 70%).
What are the cheapest flights from Washington, D.C. to Region of Ontario?
On average you can expect to pay $2,379 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $96 while the most popular route, (Washington, D.C. Reagan-National - Montreal Pierre Elliott Trudeau Intl) is currently priced at $301.
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 $310). Flying from Washington, D.C. to Region of Ontario in July is currently the most expensive (average of $369). 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.

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

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$106	Average$411	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$116	Average$391	FlexibilityNo cancel fee	On-time67%
Porter Airlines	Cheapest$128	Average$339	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$129	Average$481	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$263	Average$363	FlexibilityNo cancel fee	On-time71%
Air Transat	Cheapest$263	Average$439	FlexibilityNo cancel fee	On-time50%
WestJet	Cheapest$516	Average$681	FlexibilityNo cancel fee	On-time60%

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$96+ Cheap flights from Washington, D.C. (WAS) to Ontario

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap 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 September 11, 2026.

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 September 11, 2026.

Best flights from Washington, D.C. to OntarioDiscover 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 September 11, 2026.

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 September 11, 2026.

Last-minute flights from Washington, D.C. to OntarioDiscover last-minute flight deals from Washington, D.C. to Ontario. Data last updated September 11, 2026 and is based on user searches.

Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated September 11, 2026 and is based on user searches.

One-way flights from Washington, D.C. to OntarioSearch for one-way flight options from Washington, D.C. to Ontario. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.

Search for one-way flight options from Washington, D.C. to Ontario. Find affordable one-way fares based on user searches. Data last updated September 11, 2026.

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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.

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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 September 11, 2026.

It’s optimal to fly from Washington, D.C. to Region of Ontario at noon. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight in the morning.

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

The most flights from WAS to CAON are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).

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

Airfare is below average for this route at the moment.

Washington, D.C. to Region of Ontario flights typically cost between $258 and $468 in October.The cheapest round-trip price found within the last 5 days was $194 on Air Canada (Oct 15-Oct 19).

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

To ensure you get the cheapest price possible for a flight from Washington, D.C. to Region of Ontario, you should look to book at least 61 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Ontario. Price data was last updated on November 25, 2025.

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

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines,Air Transat, andUnited Airlines from Washington, D.C. to Ontario to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

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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Washington, D.C. and Ontario flights

Browse other Washington, D.C. and Ontario flight options. Last updated on September 11, 2026.

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Washington, D.C. to Ontario flights

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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 September 11, 2026.

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 September 11, 2026.

Last-minute flights from Washington, D.C. to Ontario
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated September 11, 2026 and is based on user searches.

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 September 11, 2026.

Washington, D.C. to Region of Ontario flights typically cost between $258 and $468 in October.
The cheapest round-trip price found within the last 5 days was $194 on Air Canada (Oct 15-Oct 19).