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Cheap flights from Washington to Ontario from C$ 189

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
29 Aug — 5 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Washington to Ontario
Explore the most affordable flight options available from Washington to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2026.

Sat 29/83:30 p.m.
PDX
-
YYZ
2 stops12h 12m
Air Canada
Sat 5/99:25 a.m.
YYZ
-
PDX
1 stop8h 26m
Air Canada
Deal found 25/7C$ 432
Fri 18/97:45 p.m.
PDX
-
YYZ
1 stop8h 45m
Air Canada
Fri 25/98:00 a.m.
YYZ
-
PDX
2 stops14h 11m
Air Canada
Deal found 26/7C$ 472
Sat 26/92:27 p.m.
PDX
-
YYZ
1 stop6h 32m
United Airlines
Sat 3/103:53 p.m.
YYZ
-
PDX
1 stop9h 28m
United Airlines
Deal found 28/7C$ 483
Sat 29/811:02 p.m.
PDX
-
YYZ
1 stop9h 47m
United Airlines
Sat 5/94:18 p.m.
YYZ
-
PDX
1 stop7h 47m
United Airlines
Deal found 25/7C$ 484
Thu 24/97:35 p.m.
SEA
-
YOW
1 stop7h 00m
WestJet
Mon 28/912:25 p.m.
YOW
-
SEA
2 stops9h 20m
WestJet
Deal found 25/7C$ 487
Sat 12/95:00 a.m.
PDX
-
YYZ
1 stop7h 14m
United Airlines
Sat 19/910:45 a.m.
YYZ
-
PDX
1 stop7h 20m
United Airlines
Deal found 29/7C$ 489
Tue 25/85:00 a.m.
PDX
-
YYZ
1 stop7h 14m
United Airlines
Tue 1/910:45 a.m.
YYZ
-
PDX
2 stops10h 34m
United Airlines
Deal found 26/7C$ 490
Wed 26/87:16 a.m.
PDX
-
YYZ
1 stop10h 28m
Multiple Airlines
Wed 2/97:30 a.m.
YYZ
-
PDX
1 stop10h 21m
Multiple Airlines
Deal found 27/7C$ 491
Sat 29/811:34 p.m.
PDX
-
YYZ
2 stops10h 52m
American Airlines
Sat 5/91:15 p.m.
YYZ
-
PDX
1 stop7h 45m
American Airlines
Deal found 29/7C$ 497
Wed 9/97:15 p.m.
PDX
-
YUL
1 stop10h 01m
United Airlines
Thu 10/911:23 a.m.
YUL
-
PDX
2 stops12h 42m
United Airlines
Deal found 25/7C$ 498
Thu 13/811:02 p.m.
PDX
-
YYZ
1 stop13h 44m
United Airlines
Tue 18/88:00 p.m.
YYZ
-
PDX
1 stop16h 50m
United Airlines
Deal found 27/7C$ 501
Mon 17/87:45 p.m.
PDX
-
YUL
2 stops13h 08m
Air Canada
Tue 25/87:30 a.m.
YUL
-
PDX
1 stop10h 21m
Air Canada
Deal found 26/7C$ 511

Find flight deals from Washington to Ontario

Keep the following information in mind while searching for Washington to Ontario flight deals. Data was last updated 30 July 2026.

Round-trip from

C$ 432

One-way from

C$ 189

Popular in

July

Cheapest in

January

Average price

C$ 911

Good round-trip deal

C$ 911 or less

Good one-way deal

C$ 443 or less
Air Canada
  • Air Canada
  • 29/8-5/9
  • 3 total stops
  • 20h 38m total
  • Washington to Ontario
Search Deals
WestJet
  • WestJet
  • 12/9
  • 1 total stop
  • 7h 35m total
  • Washington to Ontario
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (C$ 298 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington to Ontario.
Search Deals
Price to beat on a one-way flight from Washington to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 30 July 2026.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 8/9

11:18 p.m.-11:43 a.m.

1 stop9h 25m

Toronto Pearson Intl

Tue 15/9

11:00 a.m.-3:56 p.m.

1 stop7h 56m

C$ 483

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 13/8

11:02 p.m.-3:46 p.m.

1 stop13h 44m

Toronto Pearson Intl

Tue 18/8

8:00 p.m.-9:50 a.m.

1 stop16h 50m

C$ 501

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 12/11

7:05 a.m.-10:51 p.m.

1 stop12h 46m

Toronto Pearson Intl

Tue 17/11

12:25 p.m.-9:52 p.m.

1 stop12h 27m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sun 20/9

5:00 a.m.-3:14 p.m.

1 stop7h 14m

Toronto Pearson Intl

Tue 29/9

6:10 a.m.-12:01 p.m.

1 stop8h 51m

C$ 503

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 24/9

11:30 p.m.-11:49 a.m.

1 stop9h 19m

Toronto Pearson Intl

Sat 3/10

7:00 a.m.-11:33 a.m.

1 stop7h 33m

C$ 503

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Wed 30/9

11:30 p.m.-5:30 p.m.

1 stop15h 00m

Montreal Pierre Elliott Trudeau Intl

Mon 5/10

6:35 p.m.-12:34 a.m.

1 stop8h 59m

C$ 513

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Sat 31/10

10:47 a.m.-9:17 p.m.

1 stop7h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 4/11

9:15 a.m.-8:15 p.m.

1 stop14h 00m

C$ 514

PortlandMontreal

PDX - YUL

PDXYUL

Portland

Sat 22/8

3:43 p.m.-8:16 a.m.

1 stop13h 33m

Montreal Pierre Elliott Trudeau Intl

Sat 29/8

7:30 a.m.-2:51 p.m.

1 stop10h 21m

C$ 520

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 24/9

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Mon 28/9

8:15 p.m.-9:40 a.m.

1 stop16h 25m

C$ 521

PortlandToronto

PDX - YTZ

PDXYTZ

Portland

Sat 12/9

7:45 p.m.-10:55 a.m.

2 stops12h 10m

Toronto Island

Sat 19/9

12:15 p.m.-7:18 p.m.

1 stop10h 03m

C$ 522

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of C$ 393). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of C$ 822). 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 WA to ON?

Find hourly flight availability from Washington 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 30 July 2026.

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

Weekly flight availability from State of Washington to Region of Ontario

Explore weekly flight availability from Washington to Ontario. 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 30 July 2026.

The most flights from USWA to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from State of Washington to Region of Ontario?

Airfare is below average for this route at the moment.
State of Washington to Region of Ontario flights typically cost between C$ 548 and C$ 1,042 in August.
The cheapest round-trip price found within the last 5 days was C$ 528 on WestJet (26 Aug-2 Sep).

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

The best time to book flights from State of Washington to Region of Ontario is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 30 July 2026.
Get a feel of what it's like to fly with Alaska Airlines,WestJet, andAir Canada from Washington to Ontario by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,731 reviews
Check prices

Food

7.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Alaska Airlines
7.9
Good
12,731 reviews
Alaska Airlines
7.9
Good
12,731 reviews
Check prices

Food

7.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
WestJet
7.2
Good
3,416 reviews
Alaska Airlines
7.9
Good
12,731 reviews
Check prices

Food

7.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
Air Canada
7.1
Good
11,406 reviews
Alaska Airlines
7.9
Good
12,731 reviews
Check prices

Food

7.0

Comfort

7.8

Entertainment

7.0

Crew

8.5

Overall

7.9

Boarding

8.1

Reviews

1 / 20
6.0
Good

Anonymous,Jul 2026

SEA - LHR

Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle

Related info for your journey

Find useful and relevant information for your journey from Washington 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 State of Washington to Region of Ontario?

    There are many flights that can get you from State of Washington to Region of Ontario in 7h. Fly via United Airlines, WestJet, or Air Canada to get the fastest option. Airlines will cover a distance of 3529 km. Both multi-stop and direct flights can be found to your destination and back.

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

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

  • How can I find direct flights from Washington to Ontario?

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Region of Ontario (average of C$ 393). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of C$ 822). 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 to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Washington to Ontario

Discover the top 3 airlines that operate flights from Washington to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 30 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 264AverageC$ 548FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Alaska AirlinesCheapestC$ 287AverageC$ 786FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
WestJetCheapestC$ 291AverageC$ 446FlexibilityNo cancel feeOn-time60%
Search WestJet flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Washington today with Cheapflights!

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

Cheapflights simply makes it quick and affordable to book flights from Washington to Ontario by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Certainly. Search results for flights to Ontario from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from Washington to Ontario 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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