Ontario

$75+ Cheap flights from Washington 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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
Feb 25 — Mar 41
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Cheap flight deals from Washington to Ontario

Keep the following information in mind while searching for Washington to Ontario flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$187
(Kiwi.com)

One-way from

$75
(Kiwi.com)

Popular in

April

Cheapest in

January

Average price

$323

Good round-trip deal

$348 or less

Good one-way deal

$173 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Toronto (YTO) flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Toronto (YTO) flights.
From Washington to Ontario
One-way flight from Washington to Ontario
Highest demand for flights based on searches. 14% potential increase in price ($80 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Washington to Ontario.
Price to beat on a one-way flight from Washington to Ontario.

Find flight deals from Washington to Ontario

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 February 20, 2025.

This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/86:13 pmPDX - YYZ
1 stop9h 30mMultiple Airlines
Tue 4/228:00 pmYYZ - PDX
1 stop15h 22mMultiple Airlines
Deal found 2/20$187
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/29:48 amSEA - YYZ
1 stop17h 55mMultiple Airlines
Tue 4/88:00 pmYYZ - SEA
1 stop18h 35mMultiple Airlines
Deal found 2/20$206
This Vakatrip deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vakatrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/73:15 pmSEA - YKF
1 stop7h 01mWestJet
Tue 4/86:30 amYKF - SEA
1 stop10h 51mWestJet
Deal found 2/20$240
This Mytrip deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/183:15 pmSEA - YYZ
2 stops11h 43mWestJet
Wed 4/237:55 amYYZ - SEA
1 stop9h 26mWestJet
Deal found 2/19$261
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1111:48 amSEA - YOW
1 stop25h 57mMultiple Airlines
Mon 3/176:10 pmYOW - SEA
1 stop20h 36mMultiple Airlines
Deal found 2/19$264
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/611:30 amSEA - YKF
2 stops10h 46mMultiple Airlines
Sun 4/139:05 pmYKF - SEA
1 stop20h 16mMultiple Airlines
Deal found 2/20$273
This Trip.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/281:50 pmSEA - YHM
1 stop7h 51mWestJet
Sun 6/86:00 amYHM - SEA
1 stop9h 58mWestJet
Deal found 2/20$282
This Flightnetwork deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/36:05 amSEA - YYZ
Nonstop4h 55mAir Canada
Thu 4/107:05 pmYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 2/19$292
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/16:05 amSEA - YYZ
Nonstop4h 55mUnited Airlines
Tue 4/15:25 pmYYZ - SEA
1 stop10h 33mUnited Airlines
Deal found 2/19$294
This Flightnetwork deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/55:45 amSEA - YTZ
2 stops11h 52mAir Canada
Sat 4/124:20 pmYTZ - SEA
2 stops8h 43mAir Canada
Deal found 2/19$295
This Mytrip deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/38:28 pmPDX - YTZ
2 stops20h 22mMultiple Airlines
Tue 3/113:25 pmYTZ - PDX
2 stops25h 13mMultiple Airlines
Deal found 2/20$295
This deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:18 amSEA - YYZ
Nonstop4h 37mAlaska Airlines
Wed 3/194:20 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 2/18$302

Find flights from Washington to Ontario within your budget

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 2,558,603 searches. Data last updated February 20, 2025.

Fly from

Washington

Fly to

Ontario

Route

Depart

Return

Price

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

Tue 4/8

6:13 pm-6:43 am

1 stop9h 30m

Toronto Pearson Intl

Tue 4/22

8:00 pm-8:22 am

1 stop15h 22m

$187

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 4/2

9:48 am-6:43 am

1 stop17h 55m

Toronto Pearson Intl

Tue 4/8

8:00 pm-11:35 am

1 stop18h 35m

$206

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Mon 4/7

3:15 pm-1:16 am

1 stop7h 01m

Toronto Region of Waterloo Intl

Tue 4/8

6:30 am-2:21 pm

1 stop10h 51m

$240

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 4/18

3:15 pm-5:58 am

2 stops11h 43m

Toronto Pearson Intl

Wed 4/23

7:55 am-2:21 pm

1 stop9h 26m

$261

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Tue 3/11

11:48 am-4:45 pm

1 stop25h 57m

Ottawa

Mon 3/17

6:10 pm-11:46 am

1 stop20h 36m

$264

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Sun 4/6

11:30 am-1:16 am

2 stops10h 46m

Toronto Region of Waterloo Intl

Sun 4/13

9:05 pm-2:21 pm

1 stop20h 16m

$273

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

Wed 5/28

1:50 pm-12:41 am

1 stop7h 51m

Hamilton

Sun 6/8

6:00 am-12:58 pm

1 stop9h 58m

$282

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Thu 4/3

6:05 am-2:00 pm

Nonstop4h 55m

Toronto Pearson Intl

Thu 4/10

7:05 pm-9:26 pm

Nonstop5h 21m

$292

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 4/1

6:05 am-2:00 pm

Nonstop4h 55m

Toronto Pearson Intl

Tue 4/1

5:25 pm-12:58 am

1 stop10h 33m

$294

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

Sat 4/5

5:45 am-8:37 pm

2 stops11h 52m

Toronto Island

Sat 4/12

4:20 pm-10:03 pm

2 stops8h 43m

$295

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 60 results
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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.

Travel insights for flights from Washington to Ontario

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

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 $243). Flying from State of Washington 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 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 February 20, 2025.

When flying from State of Washington 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 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 February 20, 2025.

The most flights from USWA to CAON are scheduled on a Wednesday (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 Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals 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

Plan your trip to Ontario by taking into account the average temperature totals 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

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 February 20, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and United Airlines from Washington to Ontario. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

8.0
Very good

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Entertainment

7.1

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.2

Comfort

7.9

Reviews

1 / 20

10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $122. Alaska Airlines flights start at $127 while deals on WestJet start at $132 one-way.

  • 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 $243). Flying from State of Washington 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 to Ontario

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

Top 6 airlines flying from Washington to Ontario

Discover the top 6 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 2,558,603 searches. Data last updated February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$152Average$556FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$158Average$684FlexibilityNo cancel feeOn-time69%
WestJetCheapest$235Average$500FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$248Average$532FlexibilityNo cancel feeOn-time75%
DeltaCheapest$359Average$587FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$464Average$844FlexibilityNo cancel feeOn-time71%
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