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Cheap flights from Washington to Ontario from C$ 134

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 27/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
16 Apr — 23 Apr1
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 17 March 2026.

Sat 25/410:20 a.m.
SEA
-
YYZ
2 stops10h 26m
Air Canada
Fri 1/512:30 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Deal found 13/3C$ 300
Sat 2/57:20 p.m.
SEA
-
YYZ
2 stops9h 50m
Air Canada
Fri 8/512:30 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Deal found 13/3C$ 301
Wed 29/43:40 p.m.
SEA
-
YYZ
2 stops10h 49m
Air Canada
Tue 5/512:30 a.m.
YYZ
-
SEA
2 stops12h 20m
Air Canada
Deal found 15/3C$ 312
Sat 25/48:00 a.m.
SEA
-
YYZ
Nonstop4h 54m
Multiple Airlines
Sat 2/54:55 p.m.
YYZ
-
SEA
Nonstop5h 28m
Multiple Airlines
Deal found 17/3C$ 329
Sun 19/48:00 p.m.
SEA
-
YTZ
2 stops11h 25m
Air Canada
Tue 28/46:55 p.m.
YTZ
-
SEA
2 stops23h 10m
Air Canada
Deal found 13/3C$ 386
Tue 14/48:00 p.m.
SEA
-
YTZ
2 stops11h 25m
Air Canada
Sat 18/43:40 p.m.
YTZ
-
SEA
2 stops10h 13m
Air Canada
Deal found 15/3C$ 389
Thu 9/45:40 a.m.
SEA
-
YTZ
2 stops9h 42m
Air Canada
Sat 18/43:40 p.m.
YTZ
-
SEA
2 stops10h 13m
Air Canada
Deal found 15/3C$ 404
Sat 2/57:20 p.m.
SEA
-
YTZ
2 stops12h 07m
Air Canada
Sat 9/56:55 p.m.
YTZ
-
SEA
2 stops17h 55m
Air Canada
Deal found 13/3C$ 405
Wed 29/48:00 p.m.
SEA
-
YTZ
2 stops11h 25m
Air Canada
Wed 6/58:55 p.m.
YTZ
-
SEA
2 stops15h 55m
Air Canada
Deal found 15/3C$ 407
Mon 27/48:00 p.m.
SEA
-
YTZ
2 stops11h 25m
Air Canada
Mon 4/56:55 p.m.
YTZ
-
SEA
2 stops17h 55m
Air Canada
Deal found 13/3C$ 412
Thu 9/45:40 a.m.
SEA
-
YTZ
2 stops9h 42m
Air Canada
Mon 20/43:40 p.m.
YTZ
-
SEA
2 stops10h 13m
Air Canada
Deal found 15/3C$ 419
Fri 10/45:40 a.m.
SEA
-
YTZ
2 stops9h 42m
Air Canada
Tue 14/48:55 p.m.
YTZ
-
SEA
2 stops21h 10m
Air Canada
Deal found 12/3C$ 420

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 17 March 2026.

Round-trip from

C$ 300

One-way from

C$ 134

Popular in

June

Cheapest in

January

Average price

C$ 548

Good one-way deal

C$ 136 or less
Air Canada
  • Air Canada
  • 25/4-1/5
  • 4 total stops
  • 22h 46m total
  • Washington to Ontario
Search Deals
Air Canada
  • Air Canada
  • 27/4
  • 2 total stops
  • 10h 49m total
  • Washington to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (C$ 114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 17 March 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

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 22/4

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

1 stop9h 31m

Toronto Pearson Intl

Wed 29/4

12:09 p.m.-7:59 p.m.

1 stop10h 50m

C$ 442

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 28/5

7:40 a.m.-11:54 p.m.

1 stop13h 14m

Toronto Pearson Intl

Tue 2/6

10:45 a.m.-3:55 p.m.

1 stop8h 10m

C$ 452

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 3/6

9:10 a.m.-11:14 p.m.

1 stop11h 04m

Toronto Pearson Intl

Mon 8/6

2:15 p.m.-10:05 p.m.

1 stop10h 50m

C$ 455

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 2/5

2:55 p.m.-10:27 a.m.

2 stops16h 32m

Toronto Island

Tue 5/5

8:55 p.m.-9:50 a.m.

2 stops15h 55m

C$ 461

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Sat 25/4

7:14 p.m.-7:00 a.m.

1 stop8h 46m

Toronto Pearson Intl

Fri 1/5

5:20 p.m.-10:38 p.m.

1 stop8h 18m

C$ 470

SpokaneToronto

GEG - YYZ

GEGYYZ

Spokane

Sat 18/4

5:05 a.m.-3:14 p.m.

1 stop7h 09m

Toronto Pearson Intl

Wed 22/4

10:45 a.m.-9:11 p.m.

1 stop13h 26m

C$ 472

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Wed 13/5

11:02 p.m.-1:30 p.m.

1 stop11h 28m

Toronto Pearson Intl

Sun 17/5

2:20 p.m.-9:52 p.m.

1 stop10h 32m

C$ 472

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Thu 9/4

2:30 p.m.-11:59 p.m.

1 stop6h 29m

Toronto Pearson Intl

Thu 16/4

4:18 p.m.-10:54 p.m.

1 stop9h 36m

C$ 472

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Mon 13/4

11:15 p.m.-11:43 a.m.

1 stop9h 28m

Toronto Pearson Intl

Wed 15/4

2:30 p.m.-8:42 p.m.

1 stop9h 12m

C$ 472

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 15/5

11:00 p.m.-11:43 a.m.

1 stop9h 43m

Toronto Pearson Intl

Wed 20/5

6:30 a.m.-2:36 p.m.

1 stop11h 06m

C$ 481

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/3

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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$ 181). Flying from State of Washington to Region of Ontario in December is currently the most expensive (average of C$ 385). 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 17 March 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 17 March 2026.

The most flights from USWA to CAON are scheduled on a Monday (5 on average). You will have fewer flight options on Wednesday, 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?

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 17 March 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
12,059 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,059 reviews
Alaska Airlines
7.9
Good
12,059 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
WestJet
7.2
Good
3,296 reviews
Alaska Airlines
7.9
Good
12,059 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Air Canada
7.1
Good
10,811 reviews
Alaska Airlines
7.9
Good
12,059 reviews
Check prices

Boarding

8.1

Food

7.0

Overall

7.9

Entertainment

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 Delta, United Airlines, or WestJet 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$ 181). Flying from State of Washington to Region of Ontario in December is currently the most expensive (average of C$ 385). 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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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 17 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 283AverageC$ 434FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Alaska AirlinesCheapestC$ 303AverageC$ 698FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapestC$ 361AverageC$ 457FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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