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

$92 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 Air Transat and Porter Airlines, with prices starting from $93 and $95, 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 - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Reagan-National - Toronto Pearson 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 $1,259 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $86 while the most popular route, (Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at $269.

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 (79%), Copa Airlines (78%), Air Canada( 77%).

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 44 days in advance, which can save you up to 119% on flights from Washington, D.C. to Region of Ontario compared to booking the week you need them. Waiting 44 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 $612.

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 $300. Cheapflights users have found deals in the month of April for as cheap as $210. 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.

$45+ Save on 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	$181 (Mytrip)
One-way from	$45 (Trip.com)
Popular in	August
Cheapest in	April
Average price	$318
Good round-trip deal	$181 or less
Good one-way deal	$98 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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 1% potential increase in price ($6 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 February 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 February 20, 2025.

Tue 3/116:50 amBWI - YYZ

1 stop17h 05mMultiple Airlines

Fri 3/142:55 pmYYZ - BWI

1 stop18h 20mMultiple Airlines

Deal found 2/19

$181

Tue 4/81:45 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Tue 4/88:55 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 2/20

$186

Tue 3/257:00 amIAD - YTZ

Nonstop1h 30mMultiple Airlines

Wed 4/211:30 amYTZ - IAD

Nonstop1h 29mMultiple Airlines

Deal found 2/19

$208

Tue 4/86:00 amDCA - YYZ

1 stop6h 39mAir Canada

Tue 4/84:30 pmYYZ - DCA

Nonstop1h 33mAir Canada

Deal found 2/19

$215

Tue 4/812:40 pmIAD - YYZ

Nonstop1h 39mAir Canada

Tue 4/85:05 pmYYZ - IAD

1 stop4h 10mAir Canada

Deal found 2/19

$225

Tue 3/45:41 pmBWI - YUL

2 stops23h 04mMultiple Airlines

Tue 3/186:35 pmYUL - BWI

1 stop14h 40mMultiple Airlines

Deal found 2/20

$226

Wed 3/196:59 amDCA - YYZ

Nonstop1h 35mMultiple Airlines

Wed 3/1911:00 amYYZ - DCA

1 stop4h 29mMultiple Airlines

Deal found 2/19

$231

Wed 3/1912:37 pmIAD - YYZ

Nonstop1h 41mMultiple Airlines

Wed 3/194:20 pmYYZ - IAD

1 stop5h 03mMultiple Airlines

Deal found 2/19

$231

Tue 3/183:55 pmIAD - YTZ

1 stop5h 55mAir Canada

Tue 3/258:25 amYTZ - IAD

1 stop6h 48mAir Canada

Deal found 2/18

$237

Tue 4/86:00 amDCA - YTZ

1 stop5h 47mAir Canada

Tue 4/83:25 pmYTZ - DCA

1 stop5h 43mAir Canada

Deal found 2/20

$237

Tue 4/151:45 pmIAD - YTZ

Nonstop1h 30mAir Transat

Sat 4/196:00 pmYTZ - IAD

Nonstop1h 29mAir Transat

Deal found 2/19

$249

Sat 5/38:25 amIAD - YYZ

Nonstop1h 39mUnited Airlines

Sat 5/312:05 pmYYZ - IAD

1 stop4h 24mUnited Airlines

Deal found 2/18

$252

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 February 20, 2025.

Tue 3/116:50 amBWI - YYZ

1 stop17h 05mMultiple Airlines

Fri 3/142:55 pmYYZ - BWI

1 stop18h 20mMultiple Airlines

Deal found 2/19

$181

Tue 4/81:45 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Tue 4/88:55 pmYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 2/20

$186

Tue 4/86:00 amDCA - YYZ

1 stop6h 39mAir Canada

Tue 4/84:30 pmYYZ - DCA

Nonstop1h 33mAir Canada

Deal found 2/20

$218

Tue 4/151:45 pmIAD - YTZ

Nonstop1h 30mAir Transat

Sat 4/196:00 pmYTZ - IAD

Nonstop1h 29mAir Transat

Deal found 2/19

$249

Tue 4/292:55 pmDCA - YYZ

Nonstop1h 40mAmerican Airlines

Sat 5/311:00 amYYZ - DCA

Nonstop1h 40mAmerican Airlines

Deal found 2/20

$251

Tue 4/1510:19 amBWI - YYZ

1 stop6h 40mDelta

Tue 4/226:08 pmYYZ - BWI

1 stop5h 13mDelta

Deal found 2/20

$254

Fri 3/2110:35 amIAD - YYZ

Nonstop1h 31mUnited Airlines

Mon 3/317:47 pmYYZ - IAD

Nonstop1h 38mUnited Airlines

Deal found 2/20

$265

Mon 4/73:30 pmIAD - YYZ

Nonstop1h 39mWestJet

Mon 4/1412:10 pmYYZ - IAD

1 stop7h 43mWestJet

Deal found 2/20

$271

Sat 4/58:17 amIAD - YOW

Nonstop1h 41mLufthansa

Sun 4/67:29 pmYOW - IAD

Nonstop1h 46mLufthansa

Deal found 2/19

$372

Tue 3/257:00 amIAD - YTZ

Nonstop1h 30mMultiple Airlines

Wed 4/211:30 amYTZ - IAD

Nonstop1h 29mMultiple Airlines

Deal found 2/19

$208

Tue 4/812:40 pmIAD - YYZ

Nonstop1h 39mAir Canada

Tue 4/85:05 pmYYZ - IAD

1 stop4h 10mAir Canada

Deal found 2/20

$223

Tue 3/45:41 pmBWI - YUL

2 stops23h 04mMultiple Airlines

Tue 3/186:35 pmYUL - BWI

1 stop14h 40mMultiple Airlines

Deal found 2/20

$226

Last-minute flights from Washington, D.C. to Ontario
Discover last-minute flight deals from Washington, D.C. to Ontario. Data last updated February 20, 2025 and is based on user searches.

Tue 2/258:39 pmBWI - YYZ

1 stop15h 06mMultiple Airlines

Tue 3/187:10 amYYZ - BWI

1 stop13h 46mMultiple Airlines

Deal found 2/20

$218

Tue 2/255:45 pmIAD - YYZ

1 stop18h 00mMultiple Airlines

Mon 3/38:00 pmYYZ - IAD

1 stop20h 55mMultiple Airlines

Deal found 2/19

$266

Tue 2/256:49 pmBWI - YYZ

1 stop5h 03mDelta

Tue 3/47:45 amYYZ - BWI

1 stop3h 56mDelta

Deal found 2/19

$358

Thu 2/2710:35 amIAD - YYZ

Nonstop1h 31mAir Canada

Tue 3/188:10 amYYZ - IAD

Nonstop1h 36mAir Canada

Deal found 2/20

$366

Fri 2/288:55 amDCA - YYZ

1 stop14h 44mWestJet

Fri 3/76:15 amYYZ - DCA

1 stop6h 42mWestJet

Deal found 2/19

$288

Fri 2/2810:04 amDCA - YYZ

Nonstop1h 46mAmerican Airlines

Wed 3/510:55 amYYZ - DCA

Nonstop1h 40mAmerican Airlines

Deal found 2/19

$375

Sat 3/18:39 pmBWI - YUL

1 stop27h 36mMultiple Airlines

Thu 3/63:30 pmYUL - BWI

1 stop17h 45mMultiple Airlines

Deal found 2/20

$302

Sat 3/18:00 amDCA - YYZ

1 stop8h 08mDelta

Wed 3/56:00 amYYZ - DCA

1 stop4h 16mDelta

Deal found 2/20

$373

Sat 3/11:35 pmIAD - YTZ

Nonstop1h 30mMultiple Airlines

Wed 3/511:30 amYTZ - IAD

Nonstop1h 29mMultiple Airlines

Deal found 2/19

$389

Sun 3/22:00 pmIAD - YTZ

Nonstop1h 30mPorter Airlines

Wed 4/211:30 amYTZ - IAD

Nonstop1h 29mPorter Airlines

Deal found 2/20

$322

Sun 3/28:40 pmDCA - YYZ

Nonstop1h 35mAir Canada

Wed 4/28:55 pmYYZ - DCA

Nonstop1h 33mAir Canada

Deal found 2/20

$376

Sun 3/27:00 amDCA - YYZ

1 stop4h 46mMultiple Airlines

Wed 4/28:10 amYYZ - DCA

1 stop3h 51mMultiple Airlines

Deal found 2/20

$391

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 February 20, 2025.

Wed 3/264:22 pmBWI - YYZ

1 stop21h 33mMultiple Airlines

Deal found 2/19

$45

Tue 3/182:45 pmIAD - YYZ

Nonstop1h 31mAir Canada

Deal found 2/20

$92

Wed 3/191:45 pmIAD - YTZ

Nonstop1h 30mAir Transat

Deal found 2/19

$93

Sat 4/57:00 amIAD - YTZ

Nonstop1h 30mPorter Airlines

Deal found 2/19

$95

Tue 2/255:41 pmBWI - YUL

2 stops23h 04mMultiple Airlines

Deal found 2/20

$96

Wed 3/194:10 pmDCA - YYZ

1 stop5h 40mAir Canada

Deal found 2/19

$97

Wed 3/1911:10 amDCA - YTZ

1 stop5h 40mAir Canada

Deal found 2/19

$97

Sat 4/53:55 pmIAD - YTZ

1 stop5h 40mAir Canada

Deal found 2/19

$98

Tue 3/186:30 amDCA - YYZ

1 stop4h 48mDelta

Deal found 2/19

$102

Wed 3/195:22 pmIAD - YYZ

1 stop5h 16mDelta

Deal found 2/20

$102

Wed 3/56:03 pmIAD - YYZ

1 stop15h 55mMultiple Airlines

Deal found 2/20

$103

Mon 3/1710:35 amIAD - YYZ

Nonstop1h 31mUnited Airlines

Deal found 2/20

$108

Find flights from Washington, D.C. to Ontario within your budget

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreToronto

BWI - YYZ

BWIYYZ

Baltimore/Washington

Tue 3/11

6:50 am-11:55 pm

1 stop17h 05m

Toronto Pearson Intl

Fri 3/14

2:55 pm-9:15 am

1 stop18h 20m

$181

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 4/8

1:45 pm-3:15 pm

Nonstop1h 30m

Toronto Island

Tue 4/8

8:55 pm-10:24 pm

Nonstop1h 29m

$186

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 3/25

7:00 am-8:30 am

Nonstop1h 30m

Toronto Island

Wed 4/2

11:30 am-12:59 pm

Nonstop1h 29m

$208

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Tue 4/8

6:00 am-12:39 pm

1 stop6h 39m

Toronto Pearson Intl

Tue 4/8

4:30 pm-6:03 pm

Nonstop1h 33m

$215

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Tue 4/8

12:40 pm-2:19 pm

Nonstop1h 39m

Toronto Pearson Intl

Tue 4/8

5:05 pm-9:15 pm

1 stop4h 10m

$225

BaltimoreMontreal

BWI - YUL

BWIYUL

Baltimore/Washington

Tue 3/4

5:41 pm-4:45 pm

2 stops23h 04m

Montreal Pierre Elliott Trudeau Intl

Tue 3/18

6:35 pm-9:15 am

1 stop14h 40m

$226

Washington, D.C.Toronto

DCA - YYZ

DCAYYZ

Washington, D.C. Reagan-National

Wed 3/19

6:59 am-8:34 am

Nonstop1h 35m

Toronto Pearson Intl

Wed 3/19

11:00 am-3:29 pm

1 stop4h 29m

$231

Washington, D.C.Toronto

IAD - YYZ

IADYYZ

Washington, D.C. Dulles Intl

Wed 3/19

12:37 pm-2:18 pm

Nonstop1h 41m

Toronto Pearson Intl

Wed 3/19

4:20 pm-9:23 pm

1 stop5h 03m

$231

Washington, D.C.Toronto

IAD - YTZ

IADYTZ

Washington, D.C. Dulles Intl

Tue 3/18

3:55 pm-9:50 pm

1 stop5h 55m

Toronto Island

Tue 3/25

8:25 am-3:13 pm

1 stop6h 48m

$237

Washington, D.C.Toronto

DCA - YTZ

DCAYTZ

Washington, D.C. Reagan-National

Tue 4/8

6:00 am-11:47 am

1 stop5h 47m

Toronto Island

Tue 4/8

3:25 pm-9:08 pm

1 stop5h 43m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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.

Travel insights for flights from Washington, D.C. to Ontario

Get recent, data-driven insights about flights from Washington, D.C. to Ontario including ideal travel times, pricing trends, and more.

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 Thursday (27 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (20 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 KLM 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

8,220 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

8,220 reviews

Delta

8.0

Very good

8,220 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

8,220 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.

KLM

7.8

Good

1,333 reviews

Delta

8.0

Very good

8,220 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

380 reviews

Delta

8.0

Very good

8,220 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

8,766 reviews

Delta

8.0

Very good

8,220 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?
$92 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 Air Transat and Porter Airlines, with prices starting from $93 and $95, 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 - Montreal Pierre Elliott Trudeau Intl, Washington, D.C. Reagan-National - Toronto Pearson 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 (79%), Copa Airlines (78%), Air Canada( 77%).
What are the cheapest flights from Washington, D.C. to Region of Ontario?
On average you can expect to pay $1,259 for a flight from Washington, D.C. to Region of Ontario. The cheapest flight overall is $86 while the most popular route, (Washington, D.C. Dulles Intl - Montreal Pierre Elliott Trudeau Intl) is currently priced at $269.
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

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Alternative routes for Washington, D.C. to Ontario

Dulles Intl to Vancouver Intl flights

Dulles Intl to Pierre Elliott Trudeau Intl flights

Dulles Intl to Calgary flights

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Complete your trip

Region of Ontario car rentals

Toronto Pearson Intl Airport car rentals

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Hamilton Airport car rentals

London Airport car rentals

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North Bay Airport car rentals

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

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$121	Average$396	FlexibilityNo cancel fee	On-time67%
United Airlines	Cheapest$134	Average$492	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$144	Average$342	FlexibilityNo cancel fee	On-time71%
Porter Airlines	Cheapest$198	Average$348	FlexibilityNo cancel fee	On-time52%
Delta	Cheapest$242	Average$457	FlexibilityNo cancel fee	On-timeN/A
Air Transat	Cheapest$250	Average$347	FlexibilityNo cancel fee	On-time50%
WestJet	Cheapest$311	Average$455	FlexibilityNo cancel fee	On-time60%

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$45+ 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 3/26. 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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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 February 20, 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 February 20, 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 February 20, 2025.

Find flights from Washington, D.C. to Ontario within your budget

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.

Travel insights for flights from Washington, D.C. to Ontario

Get recent, data-driven insights about flights from Washington, D.C. to Ontario including ideal travel times, pricing trends, and more.

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 February 20, 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 KLM 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?

Browse thousands of different options on Cheapflights for your next trip

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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 February 20, 2025.