What are the cheapest airlines to fly from Region of Ontario to State of Washington one-way?

C$ 140 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from C$ 222 and C$ 225, respectively.

How far in advance should I book a flight from Region of Ontario to State of Washington?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 53 days in advance, which can save you up to 79% on flights from Region of Ontario to State of Washington compared to booking the week you need them. Waiting 53 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at C$ 553. For sooner than that we have options available in the next 3 days from C$ 1,044.

What is the cheapest month to fly from Region of Ontario to State of Washington?

The best pricing can be found in the month of February. Prices to State of Washington from Region of Ontario average C$ 520. You can even find prices in February for less than C$ 520, as users have found deals to State of Washington from as low as C$ 294. The month of July appears to be one of the more expensive times to travel to State of Washington from Region of Ontario. Flying in the targeted month can save you up to 21%.

Can I find deals for flights from Ontario to Washington that include hotel bookings?

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

How can I find direct flights from Ontario to Washington?

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

Can I find deals for business class flights from Ontario to Washington?

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

C$ 139+ Flights from Ontario to Washington

Cheap flight deals from Ontario to Washington

Round-trip from	C$ 218
One-way from	C$ 140
Popular in	July
Cheapest in	February
Average price	C$ 549
Good round-trip deal	C$ 485 or less
Good one-way deal	C$ 308 or less

WestJet
3/5-7/5
2 total stops
17h 49m total
Ontario to Washington

Search Deals

WestJet
3/5
1 total stop
9h 58m total
Ontario to Washington

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (C$ 85 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (C$ 15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Price to beat on a round-trip flight from Ontario to Washington.

Search Deals

Price to beat on a one-way flight from Ontario to Washington.

Search Deals

Find flight deals from Ontario to Washington

Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Wed 30/76:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Thu 31/71:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Deal found 17/4C$ 218

Wed 7/56:00 a.m.YHM - SEA

1 stop9h 58mMultiple Airlines

Mon 12/53:20 p.m.SEA - YHM

2 stops30h 21mMultiple Airlines

Deal found 17/4C$ 324

Sat 12/76:00 a.m.YKF - SEA

2 stops33h 31mWestJet

Sun 20/77:05 a.m.SEA - YKF

1 stop14h 41mWestJet

Deal found 17/4C$ 338

Wed 7/56:00 a.m.YKF - SEA

3 stops35h 25mMultiple Airlines

Mon 12/53:20 p.m.SEA - YKF

2 stops30h 26mMultiple Airlines

Deal found 17/4C$ 341

Wed 7/58:00 a.m.YYZ - SEA

1 stop7h 58mMultiple Airlines

Mon 12/53:20 p.m.SEA - YYZ

1 stop23h 00mMultiple Airlines

Deal found 17/4C$ 341

Tue 17/66:30 a.m.YYZ - SEA

1 stop9h 28mWestJet

Tue 24/67:05 a.m.SEA - YYZ

2 stops10h 58mWestJet

Deal found 17/4C$ 344

Sat 31/56:10 a.m.YOW - SEA

2 stops9h 48mWestJet

Sat 7/67:05 a.m.SEA - YOW

1 stop8h 16mWestJet

Deal found 15/4C$ 352

Fri 13/65:30 p.m.YUL - PDX

1 stop22h 22mWestJet

Tue 17/61:45 p.m.PDX - YUL

1 stop7h 58mWestJet

Deal found 17/4C$ 358

Wed 6/87:30 a.m.YUL - PDX

1 stop10h 15mAir Canada

Mon 11/87:35 p.m.PDX - YUL

1 stop9h 41mAir Canada

Deal found 17/4C$ 367

Sat 31/56:00 p.m.YOW - SEA

1 stop7h 13mAir Canada

Sat 7/67:20 a.m.SEA - YOW

1 stop9h 57mAir Canada

Deal found 15/4C$ 373

Wed 30/411:25 a.m.YYZ - PDX

1 stop9h 40mMultiple Airlines

Wed 7/51:37 p.m.PDX - YYZ

2 stops13h 37mMultiple Airlines

Deal found 17/4C$ 388

Wed 21/511:30 a.m.YYZ - SEA

1 stop13h 30mDelta

Wed 28/56:00 a.m.SEA - YYZ

1 stop6h 00mDelta

Deal found 16/4C$ 390

Best flights from Ontario to Washington
Discover carefully curated flight deals from Ontario to Washington that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 17 April 2025.

Sat 3/56:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Wed 7/51:50 p.m.SEA - YHM

1 stop7h 51mWestJet

Deal found 15/4C$ 218

Sat 3/56:00 a.m.YHM - SEA

1 stop9h 58mMultiple Airlines

Tue 13/56:00 a.m.SEA - YHM

2 stops15h 41mMultiple Airlines

Deal found 15/4C$ 248

Wed 6/87:30 a.m.YUL - PDX

1 stop10h 15mAir Canada

Mon 11/87:35 p.m.PDX - YUL

1 stop9h 41mAir Canada

Deal found 17/4C$ 367

Wed 21/511:30 a.m.YYZ - SEA

1 stop13h 30mDelta

Wed 28/56:00 a.m.SEA - YYZ

1 stop6h 00mDelta

Deal found 16/4C$ 390

Thu 1/54:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Wed 7/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Deal found 17/4C$ 395

Wed 21/57:00 p.m.YYZ - PDX

1 stop8h 31mUnited Airlines

Mon 26/56:43 p.m.PDX - YYZ

1 stop15h 13mUnited Airlines

Deal found 17/4C$ 398

Tue 6/510:35 a.m.YYZ - PDX

2 stops13h 46mAmerican Airlines

Tue 6/511:59 p.m.PDX - YYZ

1 stop13h 26mAmerican Airlines

Deal found 17/4C$ 415

Sat 3/53:25 p.m.YYZ - SEA

2 stops10h 44mBritish Airways

Fri 9/511:59 p.m.SEA - YYZ

2 stops12h 41mBritish Airways

Deal found 16/4C$ 459

Sun 27/76:30 a.m.YYZ - SEA

1 stop9h 28mWestJet

Mon 4/82:05 p.m.SEA - YYZ

1 stop7h 19mWestJet

Deal found 16/4C$ 327

Wed 28/58:00 a.m.YYZ - SEA

1 stop7h 58mMultiple Airlines

Wed 4/66:00 a.m.SEA - YYZ

2 stops13h 54mMultiple Airlines

Deal found 15/4C$ 338

Wed 17/96:00 a.m.YKF - SEA

1 stop9h 59mWestJet

Tue 23/97:05 a.m.SEA - YKF

1 stop8h 50mWestJet

Deal found 16/4C$ 338

Sat 31/56:00 p.m.YOW - SEA

1 stop7h 13mAir Canada

Sat 7/67:20 a.m.SEA - YOW

1 stop9h 57mAir Canada

Deal found 15/4C$ 373

Direct flights from Ontario to Washington
Explore direct flight options from Ontario to Washington based on user searches, and compare prices and availability for your desired travel dates. Data last updated 17 April 2025.

Wed 7/54:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Mon 12/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Deal found 17/4C$ 395

Sun 1/64:45 p.m.YUL - SEA

Nonstop5h 52mAir Canada

Sun 8/67:20 a.m.SEA - YUL

Nonstop5h 10mAir Canada

Deal found 17/4C$ 481

Sun 4/54:45 p.m.YUL - SEA

Nonstop5h 52mMultiple Airlines

Wed 7/57:20 a.m.SEA - YUL

Nonstop5h 10mMultiple Airlines

Deal found 17/4C$ 496

Mon 22/94:45 p.m.YUL - SEA

Nonstop5h 46mUnited Airlines

Sun 28/97:20 a.m.SEA - YUL

Nonstop5h 13mUnited Airlines

Deal found 17/4C$ 534

Thu 24/47:20 p.m.YYZ - SEA

Nonstop5h 21mAir Canada

Sun 27/46:00 a.m.SEA - YYZ

Nonstop4h 57mAir Canada

Deal found 17/4C$ 573

Thu 24/47:20 p.m.YYZ - SEA

Nonstop5h 21mMultiple Airlines

Sun 27/46:00 a.m.SEA - YYZ

Nonstop4h 57mMultiple Airlines

Deal found 17/4C$ 574

Tue 1/78:50 a.m.YYZ - SEA

Nonstop5h 20mUnited Airlines

Wed 23/712:10 p.m.SEA - YYZ

Nonstop4h 42mUnited Airlines

Deal found 17/4C$ 584

Last-minute flights from Ontario to Washington
Discover last-minute flight deals from Ontario to Washington. Data last updated 17 April 2025 and is based on user searches.

Wed 23/42:45 p.m.YOW - SEA

2 stops11h 15mUnited Airlines

Wed 30/46:15 a.m.SEA - YOW

2 stops12h 50mUnited Airlines

Deal found 16/4C$ 502

Thu 24/44:45 p.m.YYZ - SEA

Nonstop5h 14mAlaska Airlines

Sun 4/57:15 a.m.SEA - YYZ

Nonstop4h 45mAlaska Airlines

Deal found 16/4C$ 434

Thu 24/42:15 p.m.YUL - SEA

1 stop10h 26mAir Canada

Thu 1/57:20 a.m.SEA - YUL

Nonstop5h 10mAir Canada

Deal found 17/4C$ 510

Fri 25/44:31 p.m.YUL - PDX

1 stop9h 05mAir Canada

Mon 5/510:50 p.m.PDX - YUL

1 stop10h 05mAir Canada

Deal found 17/4C$ 477

Sat 26/44:00 p.m.YOW - SEA

1 stop8h 41mAir Canada

Sun 4/511:30 a.m.SEA - YOW

1 stop9h 49mAir Canada

Deal found 17/4C$ 424

Sat 26/410:00 a.m.YYZ - PDX

1 stop27h 22mMultiple Airlines

Thu 1/511:02 a.m.PDX - YYZ

2 stops16h 12mMultiple Airlines

Deal found 17/4C$ 438

Sat 26/46:00 a.m.YYZ - SEA

1 stop7h 33mDelta

Fri 16/59:30 p.m.SEA - YYZ

1 stop11h 44mDelta

Deal found 17/4C$ 456

Sat 26/46:05 a.m.YOW - SEA

1 stop19h 14mMultiple Airlines

Sun 4/55:30 a.m.SEA - YOW

2 stops10h 56mMultiple Airlines

Deal found 17/4C$ 458

Sat 26/45:30 p.m.YYZ - SEA

1 stop8h 13mUnited Airlines

Sat 3/55:15 a.m.SEA - YYZ

2 stops14h 52mUnited Airlines

Deal found 16/4C$ 467

Sat 26/44:45 p.m.YYZ - PDX

1 stop7h 11mAlaska Airlines

Thu 1/510:35 a.m.PDX - YYZ

1 stop25h 25mAlaska Airlines

Deal found 17/4C$ 480

Sat 26/43:25 p.m.YYZ - SEA

2 stops10h 44mAmerican Airlines

Thu 15/51:10 a.m.SEA - YYZ

1 stop12h 15mAmerican Airlines

Deal found 17/4C$ 480

Sun 27/47:25 p.m.YYZ - SEA

2 stops24h 18mMultiple Airlines

Sun 4/58:22 p.m.SEA - YYZ

1 stop17h 58mMultiple Airlines

Deal found 16/4C$ 445

One-way flights from Ontario to Washington
Search for one-way flight options from Ontario to Washington. Find affordable one-way fares based on user searches. Data last updated 17 April 2025.

Sat 3/56:00 a.m.YHM - SEA

1 stop9h 58mWestJet

Deal found 17/4C$ 140

Wed 25/68:00 a.m.YYZ - PDX

1 stop7h 52mWestJet

Deal found 17/4C$ 172

Wed 7/57:50 a.m.YOW - SEA

1 stop8h 08mWestJet

Deal found 16/4C$ 211

Sun 4/56:00 a.m.YHM - SEA

2 stops32h 35mMultiple Airlines

Deal found 16/4C$ 215

Mon 5/51:15 p.m.YYZ - PDX

1 stop12h 44mAmerican Airlines

Deal found 17/4C$ 222

Wed 7/56:00 a.m.YOW - SEA

2 stops21h 10mMultiple Airlines

Deal found 16/4C$ 222

Tue 24/66:30 p.m.YUL - PDX

1 stop9h 00mAir Canada

Deal found 17/4C$ 225

Tue 6/56:00 p.m.YOW - SEA

1 stop7h 13mAir Canada

Deal found 16/4C$ 227

Mon 26/58:25 a.m.YYZ - SEA

Nonstop5h 20mAir Canada

Deal found 17/4C$ 236

Mon 5/56:35 p.m.YYZ - PDX

2 stops18h 11mUnited Airlines

Deal found 17/4C$ 237

Fri 9/56:00 a.m.YKF - SEA

2 stops21h 10mMultiple Airlines

Deal found 17/4C$ 237

Mon 2/68:05 p.m.YYZ - SEA

1 stop31h 05mMultiple Airlines

Deal found 16/4C$ 237

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Wed 30/7

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Thu 31/7

1:50 p.m.-12:41 a.m.

1 stop7h 51m

C$ 218

HamiltonSeattle

YHM - SEA

YHMSEA

Hamilton

Wed 7/5

6:00 a.m.-12:58 p.m.

1 stop9h 58m

Seattle/Tacoma Intl

Mon 12/5

3:20 p.m.-12:41 a.m.

2 stops30h 21m

C$ 324

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Sat 12/7

6:00 a.m.-12:31 p.m.

2 stops33h 31m

Seattle/Tacoma Intl

Sun 20/7

7:05 a.m.-12:46 a.m.

1 stop14h 41m

C$ 338

TorontoSeattle

YKF - SEA

YKFSEA

Toronto Region of Waterloo Intl

Wed 7/5

6:00 a.m.-2:25 p.m.

3 stops35h 25m

Seattle/Tacoma Intl

Mon 12/5

3:20 p.m.-12:46 a.m.

2 stops30h 26m

C$ 341

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Wed 7/5

8:00 a.m.-12:58 p.m.

1 stop7h 58m

Seattle/Tacoma Intl

Mon 12/5

3:20 p.m.-5:20 p.m.

1 stop23h 00m

C$ 341

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

Tue 17/6

6:30 a.m.-12:58 p.m.

1 stop9h 28m

Seattle/Tacoma Intl

Tue 24/6

7:05 a.m.-9:03 p.m.

2 stops10h 58m

C$ 344

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 31/5

6:10 a.m.-12:58 p.m.

2 stops9h 48m

Seattle/Tacoma Intl

Sat 7/6

7:05 a.m.-6:21 p.m.

1 stop8h 16m

C$ 352

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Fri 13/6

5:30 p.m.-12:52 p.m.

1 stop22h 22m

Portland

Tue 17/6

1:45 p.m.-12:43 a.m.

1 stop7h 58m

C$ 358

MontrealPortland

YUL - PDX

YULPDX

Montreal Pierre Elliott Trudeau Intl

Wed 6/8

7:30 a.m.-2:45 p.m.

1 stop10h 15m

Portland

Mon 11/8

7:35 p.m.-8:16 a.m.

1 stop9h 41m

C$ 367

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

Sat 31/5

6:00 p.m.-10:13 p.m.

1 stop7h 13m

Seattle/Tacoma Intl

Sat 7/6

7:20 a.m.-8:17 p.m.

1 stop9h 57m

C$ 373

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 60 results

...

Best time to book a flight from Ontario to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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 WA?

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 State of Washington as you normally would.

Weekly flight availability from Region of Ontario to State of Washington

The most flights from CAON to USWA are scheduled on a Monday (5 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Washington by month

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

Temperature in Washington by month

If weather is an important factor for your trip to State of Washington, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Washington

To help decide which airline to fly from Ontario to Washington, see what other customers have to say about Alaska Airlines, Delta and United Airlines. 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.

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,887 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,916 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,667 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

WestJet

7.2

Good

2,809 reviews

Alaska Airlines

8.0

Very good

9,887 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

What are the cheapest airlines to fly from Region of Ontario to State of Washington one-way?
C$ 140 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from C$ 222 and C$ 225, respectively.
Can I find deals for flights from Ontario to Washington that include hotel bookings?
Yes. In addition to deals on Ontario to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Washington?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Washington.
Can I find deals for business class flights from Ontario to Washington?
Yes. Cheapflights offers flight deals from Ontario to Washington 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 State of Washington?
Currently, January is the cheapest month in which you can book a flight from Region of Ontario to State of Washington (average of C$ 261). Flying from Region of Ontario to State of Washington in December is currently the most expensive (average of C$ 353). 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

Alternative routes for Ontario to Washington

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Complete your trip

State of Washington car rentals

Seattle/Tacoma Intl Airport car rentals

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Direct flights to United States

Find a return flight route from Washington

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Bellingham to Pearson Intl flights

Top 7 airlines flying from Ontario to Washington

Airline	Cheapest	Average	Flexibility	On-time
WestJet	CheapestC$ 191	AverageC$ 473	FlexibilityNo cancel fee	On-time60%	Search WestJet flights
Alaska Airlines	CheapestC$ 331	AverageC$ 700	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Air Canada	CheapestC$ 340	AverageC$ 686	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	CheapestC$ 366	AverageC$ 853	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Delta	CheapestC$ 401	AverageC$ 572	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Hawaiian Airlines	CheapestC$ 412	AverageC$ 412	FlexibilityNo cancel fee	On-time85%	Search Hawaiian Airlines flights
American Airlines	CheapestC$ 429	AverageC$ 553	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

Fly with Cheapflights

How does Cheapflights help users find flights from Ontario to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Washington. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Washington?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington from Ontario.

Can Cheapflights find flights from Ontario to Washington with no change fees?

Need flexible booking options for your flight to Washington from Ontario? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Washington become cheaper?

Of course! You can now track prices for flights from Ontario to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Ontario to Washington from C$ 139

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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to Washington

Keep the following information in mind while searching for Ontario to Washington flight deals. Data was last updated 17 April 2025.

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Find flight deals from Ontario to Washington

Cheapest flights from Ontario to WashingtonExplore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.

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Best time to book a flight from Ontario to Washington

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

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Everything you need to know about your flight from Ontario to Washington

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

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

Find hourly flight availability from Ontario to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 April 2025.

Weekly flight availability from Region of Ontario to State of Washington

Explore weekly flight availability from Ontario to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 April 2025.

Rainfall in Washington by month

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

Temperature in Washington by month

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

Reviews of airlines servicing Washington

Related info for your journey

Find useful and relevant information for your journey from Ontario to Washington. 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 State of Washington one-way?

Can I find deals for flights from Ontario to Washington that include hotel bookings?

How can I find direct flights from Ontario to Washington?

Can I find deals for business class flights from Ontario to Washington?

What is the cheapest month to book a flight from Region of Ontario to State of Washington?

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Alternative routes for Ontario to Washington

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Top 7 airlines flying from Ontario to Washington

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Cheapest flights from Ontario to Washington
Explore the most affordable flight options available from Ontario to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 April 2025.