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 34m. Porter Airlines provides one of the quickest options available for as low as $211. 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?

$79 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Porter Airlines and Delta, with prices starting from $80 and $91, 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. Dulles Intl - Toronto Pearson Intl, Washington, D.C. Reagan-National - Toronto Pearson Intl and Washington, D.C. Reagan-National - 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 $579 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $101 while the most popular route, (Washington, D.C. Dulles Intl - Toronto Pearson Intl) is currently priced at $238.

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 (74%), Jazz (73%), United Airlines( 71%).

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.

$62+ Flights from Washington, D.C. to Ontario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 18, 2025.

Wed 12/312:59 pmDCA - YYZ

Nonstop1h 40mAmerican Airlines

Tue 1/135:15 pmYYZ - DCA

Nonstop1h 59mAmerican Airlines

Deal found 12/15

$273

Tue 12/306:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Wed 1/148:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/15

$298

Tue 12/306:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Mon 1/58:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$307

Wed 12/3111:40 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Mon 1/53:45 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/17

$311

Tue 12/309:40 amDCA - YYZ

Nonstop1h 37mAir Canada

Wed 1/149:00 pmYYZ - DCA

Nonstop1h 35mAir Canada

Deal found 12/15

$316

Wed 12/315:16 pmIAD - YYZ

Nonstop1h 41mUnited Airlines

Mon 1/56:40 pmYYZ - IAD

1 stop4h 26mUnited Airlines

Deal found 12/17

$323

Wed 12/3111:40 amIAD - YUL

1 stop5h 35mPorter Airlines

Mon 1/56:45 amYUL - IAD

1 stop3h 34mPorter Airlines

Deal found 12/16

$337

Wed 12/3111:40 amIAD - YTZ

Nonstop1h 30mMultiple Airlines

Fri 1/28:50 amYTZ - IAD

Nonstop1h 29mMultiple Airlines

Deal found 12/17

$338

Tue 12/306:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Wed 12/318:55 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/15

$342

Tue 12/309:00 amIAD - YYZ

Nonstop1h 29mAir Canada

Wed 1/146:55 pmYYZ - IAD

Nonstop1h 31mAir Canada

Deal found 12/15

$352

Tue 12/306:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Fri 1/28:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$358

Wed 12/314:10 pmDCA - YYZ

1 stop7h 54mAir Canada

Tue 1/138:15 amYYZ - DCA

1 stop4h 04mAir Canada

Deal found 12/15

$360

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 December 18, 2025.

Fri 1/3011:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Sun 2/18:50 amYTZ - IAD

Nonstop1h 32mPorter Airlines

Deal found 12/16

$211

Sun 2/111:40 amIAD - YTZ

Nonstop1h 30mMultiple Airlines

Sun 2/88:50 amYTZ - IAD

Nonstop1h 32mMultiple Airlines

Deal found 12/18

$222

Sat 1/314:15 pmDCA - YTZ

1 stop5h 20mAir Canada

Sat 2/710:45 amYTZ - DCA

1 stop4h 48mAir Canada

Deal found 12/17

$223

Thu 1/810:12 amDCA - YYZ

Nonstop1h 47mAmerican Airlines

Mon 1/125:15 pmYYZ - DCA

Nonstop1h 59mAmerican Airlines

Deal found 12/16

$239

Thu 1/2912:35 pmIAD - YYZ

Nonstop1h 39mUnited Airlines

Sat 1/317:40 pmYYZ - IAD

Nonstop1h 45mUnited Airlines

Deal found 12/17

$250

Thu 1/1511:10 amDCA - YYZ

1 stop6h 13mDelta

Mon 1/196:06 amYYZ - DCA

1 stop4h 07mDelta

Deal found 12/16

$264

Sun 1/1811:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Thu 1/228:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$215

Thu 1/86:59 amDCA - YYZ

Nonstop1h 36mAir Canada

Mon 1/126:10 pmYYZ - DCA

Nonstop1h 35mAir Canada

Deal found 12/16

$225

Fri 2/1311:40 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Fri 2/133:45 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$215

Sat 1/171:44 pmDCA - YYZ

1 stop3h 44mAmerican Airlines

Sat 1/2410:59 amYYZ - DCA

Nonstop1h 51mAmerican Airlines

Deal found 12/16

$249

Thu 1/812:55 pmDCA - YTZ

1 stop5h 18mAir Canada

Mon 1/125:30 pmYTZ - DCA

1 stop4h 26mAir Canada

Deal found 12/16

$227

Wed 2/45:16 pmIAD - YYZ

Nonstop1h 41mUnited Airlines

Sun 2/82:45 pmYYZ - IAD

Nonstop1h 45mUnited Airlines

Deal found 12/17

$250

Sat 1/1712:10 pmDCA - YYZ

1 stop8h 16mDelta

Mon 1/196:00 amYYZ - DCA

1 stop4h 28mDelta

Deal found 12/16

$264

Thu 4/1611:40 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Mon 4/208:55 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/18

$221

Tue 2/310:00 amDCA - YYZ

1 stop9h 00mAmerican Airlines

Wed 2/1110:59 amYYZ - DCA

Nonstop1h 50mAmerican Airlines

Deal found 12/17

$249

Fri 2/2710:09 pmIAD - YYZ

Nonstop1h 37mUnited Airlines

Sun 3/110:00 amYYZ - IAD

Nonstop1h 46mUnited Airlines

Deal found 12/17

$250

Fri 1/306:00 amDCA - YTZ

2 stops5h 42mAir Canada

Fri 2/69:30 amYTZ - DCA

1 stop6h 03mAir Canada

Deal found 12/15

$235

Thu 1/81:45 pmDCA - YYZ

1 stop4h 08mDelta

Mon 1/126:45 pmYYZ - DCA

1 stop4h 25mDelta

Deal found 12/16

$264

Sun 2/16:20 amBWI - YYZ

2 stops13h 51mMultiple Airlines

Sun 2/812:15 pmYYZ - BWI

3 stops35h 21mMultiple Airlines

Deal found 12/17

$294

Fri 3/1311:40 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Mon 3/163:45 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$225

Fri 4/176:15 amIAD - YYZ

1 stop5h 34mUnited Airlines

Fri 4/172:30 pmYYZ - IAD

Nonstop1h 38mUnited Airlines

Deal found 12/17

$251

Fri 1/3011:00 amDCA - YYZ

1 stop5h 12mDelta

Fri 2/66:13 pmYYZ - DCA

1 stop4h 35mDelta

Deal found 12/15

$264

Wed 4/156:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Sun 4/198:55 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/17

$226

Fri 1/99:40 amDCA - YYZ

Nonstop1h 37mAir Canada

Sun 1/118:15 amYYZ - DCA

1 stop4h 04mAir Canada

Deal found 12/17

$255

Thu 2/268:36 amIAD - YYZ

1 stop5h 07mUnited Airlines

Sun 3/17:40 pmYYZ - IAD

Nonstop1h 41mUnited Airlines

Deal found 12/17

$259

Fri 1/1610:08 pmIAD - YOW

2 stops19h 07mMultiple Airlines

Mon 1/197:00 amYOW - IAD

1 stop3h 19mMultiple Airlines

Deal found 12/16

$314

Fri 2/68:50 amDCA - YYZ

1 stop4h 34mDelta

Sat 2/217:50 amYYZ - DCA

1 stop5h 04mDelta

Deal found 12/18

$264

Thu 4/166:30 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Fri 4/178:55 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/17

$226

Mon 2/212:55 pmDCA - YTZ

1 stop5h 18mAir Canada

Wed 2/49:30 amYTZ - DCA

1 stop6h 03mAir Canada

Deal found 12/17

$257

Thu 2/126:00 amDCA - YYZ

1 stop5h 15mDelta

Tue 2/1712:05 pmYYZ - DCA

1 stop4h 22mDelta

Deal found 12/18

$264

Last-minute flights from Washington, D.C. to Ontario
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated December 18, 2025 and is based on user searches.

Wed 1/79:09 pmBWI - YYZ

1 stop17h 11mMultiple Airlines

Thu 1/157:10 amYYZ - BWI

1 stop8h 42mMultiple Airlines

Deal found 12/16

$214

Wed 1/711:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Sun 1/118:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/18

$220

Thu 1/811:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Wed 1/218:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/17

$213

Fri 1/911:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Wed 1/218:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/17

$212

Sun 1/1111:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Sun 1/188:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$218

Thu 1/156:59 amDCA - YYZ

Nonstop1h 36mAir Canada

Thu 1/228:15 amYYZ - DCA

1 stop4h 04mAir Canada

Deal found 12/16

$211

Sun 1/1811:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Thu 1/228:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$215

Mon 1/1911:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Fri 1/238:50 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 12/16

$216

Sat 1/244:44 pmBWI - YYZ

1 stop7h 27mMultiple Airlines

Sun 1/2512:15 pmYYZ - BWI

3 stops35h 21mMultiple Airlines

Deal found 12/16

$219

Fri 1/3011:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Sun 2/18:50 amYTZ - IAD

Nonstop1h 32mPorter Airlines

Deal found 12/16

$211

Sat 1/318:40 pmDCA - YYZ

Nonstop1h 37mAir Canada

Sat 2/79:00 pmYYZ - DCA

Nonstop1h 35mAir Canada

Deal found 12/17

$212

Sat 1/319:45 amIAD - YYZ

1 stop6h 55mAir Canada

Sat 2/72:15 pmYYZ - IAD

Nonstop1h 34mAir Canada

Deal found 12/17

$215

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 December 18, 2025.

Wed 1/281:00 pmBWI - YYZ

1 stop10h 20mMultiple Airlines

Deal found 12/16

$62

Tue 1/271:00 pmBWI - YYZ

1 stop10h 20mMultiple Airlines

Deal found 12/16

$70

Wed 1/211:00 pmBWI - YYZ

1 stop10h 20mMultiple Airlines

Deal found 12/17

$81

Mon 1/266:15 amBWI - YYZ

1 stop8h 05mMultiple Airlines

Deal found 12/16

$84

Mon 2/26:15 amBWI - YYZ

1 stop8h 05mMultiple Airlines

Deal found 12/17

$85

Wed 1/78:00 amBWI - YYZ

1 stop30h 20mMultiple Airlines

Deal found 12/17

$90

Mon 1/196:20 amBWI - YYZ

1 stop17h 00mMultiple Airlines

Deal found 12/16

$96

Thu 1/1511:35 amIAD - YTZ

Nonstop1h 34mPorter Airlines

Deal found 12/16

$99

Sat 4/181:45 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Deal found 12/16

$100

Wed 1/146:59 amDCA - YYZ

Nonstop1h 36mAir Canada

Deal found 12/17

$100

Fri 1/94:30 pmIAD - YYZ

Nonstop1h 33mAir Canada

Deal found 12/16

$100

Tue 4/2812:55 pmDCA - YTZ

1 stop5h 22mAir Canada

Deal found 12/15

$100

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

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$211 (Kiwi.com)
One-way from	$62 (Kiwi.com)
Popular in	November
Cheapest in	June
Average price	$298
Good round-trip deal	$232 or less
Good one-way deal	$115 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. 7% potential increase in price ($23 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in December 2025

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

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 1/30

11:35 am-1:09 pm

Nonstop1h 34m

Toronto Island

Sun 2/1

8:50 am-10:22 am

Nonstop1h 32m

$211

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sun 1/18

11:35 am-1:09 pm

Nonstop1h 34m

Toronto Island

Thu 1/22

8:50 am-10:19 am

Nonstop1h 29m

$215

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 2/13

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Fri 2/13

3:45 pm-5:14 pm

Nonstop1h 29m

$215

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 4/16

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Mon 4/20

8:55 am-10:24 am

Nonstop1h 29m

$221

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Sun 2/1

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Sun 2/8

8:50 am-10:22 am

Nonstop1h 32m

$222

Washington, D.C.Toronto

DCA - YTZ

DCAYTZ

Washington, D.C. Reagan-National

Sat 1/31

4:15 pm-9:35 pm

1 stop5h 20m

Toronto Island

Sat 2/7

10:45 am-3:33 pm

1 stop4h 48m

$223

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Thu 1/8

6:59 am-8:35 am

Nonstop1h 36m

Toronto Pearson Intl

Mon 1/12

6:10 pm-7:45 pm

Nonstop1h 35m

$225

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Fri 3/13

11:40 am-1:10 pm

Nonstop1h 30m

Toronto Island

Mon 3/16

3:45 pm-5:14 pm

Nonstop1h 29m

$225

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Wed 4/15

6:30 pm-8:00 pm

Nonstop1h 30m

Toronto Island

Sun 4/19

8:55 am-10:24 am

Nonstop1h 29m

$226

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Thu 4/16

6:30 pm-8:00 pm

Nonstop1h 30m

Toronto Island

Fri 4/17

8:55 am-10:24 am

Nonstop1h 29m

$226

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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, March is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $94). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $171). 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 33% on the cost of your flight, compared to a flight in the evening.

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 Friday at noon when fares are most often at their lowest. Thursday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from WAS to CAON are scheduled on a Monday (29 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (16 on average).

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United 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

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

Porter Airlines

8.0

Very good

399 reviews

Porter Airlines

8.0

Very good

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

Air Transat

7.8

Good

483 reviews

Porter Airlines

8.0

Very good

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

United Airlines

7.4

Good

9,093 reviews

Porter Airlines

8.0

Very good

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

American Airlines

7.2

Good

11,055 reviews

Porter Airlines

8.0

Very good

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

Air Canada

7.1

Good

10,534 reviews

Porter Airlines

8.0

Very good

399 reviews

Reviews

1 / 20

8.0

Excellent

Mohameed,Nov 2025

LAS - YYZ

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

Related info for your journey

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 34m. Porter Airlines provides one of the quickest options available for as low as $211. 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?
$79 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Porter Airlines and Delta, with prices starting from $80 and $91, 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. Reagan-National - 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 (74%), Jazz (73%), United Airlines( 71%).
What are the cheapest flights from Washington, D.C. to Region of Ontario?
On average you can expect to pay $579 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $101 while the most popular route, (Washington, D.C. Dulles Intl - Toronto Pearson Intl) is currently priced at $238.
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, March is the cheapest month in which you can book a flight from Washington, D.C. to Region of Ontario (average of $94). Flying from Washington, D.C. to Region of Ontario in August is currently the most expensive (average of $171). 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
Porter Airlines	Cheapest$54	Average$332	FlexibilityNo cancel fee	On-time52%
United Airlines	Cheapest$127	Average$396	FlexibilityNo cancel fee	On-time69%
Air Transat	Cheapest$176	Average$245	FlexibilityNo cancel fee	On-time50%
Air Canada	Cheapest$185	Average$387	FlexibilityNo cancel fee	On-time67%
Delta	Cheapest$255	Average$336	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$261	Average$375	FlexibilityNo cancel fee	On-time71%
WestJet	Cheapest$349	Average$496	FlexibilityNo cancel fee	On-time60%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$62+ 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 1/28. 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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 December 18, 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 December 18, 2025.

Find 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 December 18, 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

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 December 18, 2025.

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 December 16, 2024.

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

Reviews of airlines servicing Ontario

Peruse reviews from past customers who have flown with Porter Airlines, Air Transat, and United 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

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.

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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

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

100% Free

Book with Flexibility

Travel Smart

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 December 18, 2025.