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$101+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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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 junio 12, 2025.

Round-trip from

$235
(Trip.com)

One-way from

$101
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$525

Good round-trip deal

$451 or less

Good one-way deal

$201 or less
From Washington to Ontario
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One-way flight from Washington to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($65 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Washington to Ontario.
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Price to beat on a one-way flight from Washington to Ontario.
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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 junio 12, 2025.

This Trip.com deal was found by Cheapflights users on 6/10. 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.
mar. 7/221:45 pmPDX - YYZ
1 stop7h 39mWestJet
mar. 7/298:00 amYYZ - PDX
1 stop8h 05mWestJet
Deal found 6/10$235
This Trip.com deal was found by Cheapflights users on 6/10. 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.
dom. 8/32:05 pmSEA - YHM
1 stop7h 36mWestJet
lun. 8/186:00 amYHM - SEA
1 stop9h 58mWestJet
Deal found 6/10$237
This Vakatrip deal was found by Cheapflights users on 6/10. 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.
vie. 7/258:40 amSEA - YYZ
2 stops12h 53mWestJet
mar. 7/299:00 amYYZ - SEA
2 stops13h 14mWestJet
Deal found 6/10$280
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/311:50 pmSEA - YKF
1 stop7h 56mWestJet
jue. 8/77:45 pmYKF - SEA
2 stops19h 46mWestJet
Deal found 6/11$280
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/157:17 amSEA - YYZ
Nonstop4h 43mAlaska Airlines
vie. 7/184:45 pmYYZ - SEA
Nonstop5h 24mAlaska Airlines
Deal found 6/10$286
This Mytrip deal was found by Cheapflights users on 6/12. 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.
lun. 8/43:25 pmPDX - YUL
2 stops12h 45mMultiple Airlines
mié. 8/137:00 amYUL - PDX
1 stop9h 05mMultiple Airlines
Deal found 6/12$286
This Air Canada deal was found by Cheapflights users on 6/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/267:15 amSEA - YTZ
1 stop9h 34mAir Canada
mar. 9/3012:25 pmYTZ - SEA
1 stop10h 06mAir Canada
Deal found 6/12$290
This Orbitz deal was found by Cheapflights users on 6/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/41:45 pmPDX - YYZ
1 stop7h 37mMultiple Airlines
mar. 9/94:45 pmYYZ - PDX
1 stop10h 14mMultiple Airlines
Deal found 6/11$292
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/1811:07 pmPDX - YYZ
1 stop15h 08mAmerican Airlines
lun. 7/216:24 pmYYZ - PDX
1 stop18h 25mAmerican Airlines
Deal found 6/12$298
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/127:40 pmPDX - YOW
1 stop9h 39mAir Canada
mar. 7/226:00 pmYOW - PDX
1 stop8h 01mAir Canada
Deal found 6/10$299
This United Airlines deal was found by Cheapflights users on 6/10. 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.
vie. 11/72:07 pmSEA - YYZ
1 stop6h 52mUnited Airlines
vie. 11/145:55 pmYYZ - SEA
1 stop10h 04mUnited Airlines
Deal found 6/10$301
This Air Canada deal was found by Cheapflights users on 6/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/157:40 pmPDX - YUL
2 stops11h 10mAir Canada
mar. 9/161:30 pmYUL - PDX
2 stops12h 31mAir Canada
Deal found 6/10$301

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 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from Washington to Ontario that are best for you.

Fly from

Washington

Fly to

Ontario

Route

Depart

Return

Price

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

mar. 7/22

1:45 pm-12:24 am

1 stop7h 39m

Toronto Pearson Intl

mar. 7/29

8:00 am-1:05 pm

1 stop8h 05m

$235

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

dom. 8/3

2:05 pm-12:41 am

1 stop7h 36m

Hamilton

lun. 8/18

6:00 am-12:58 pm

1 stop9h 58m

$237

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

vie. 7/25

8:40 am-12:33 am

2 stops12h 53m

Toronto Pearson Intl

mar. 7/29

9:00 am-7:14 pm

2 stops13h 14m

$280

SeattleToronto

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

jue. 7/31

1:50 pm-12:46 am

1 stop7h 56m

Toronto Region of Waterloo Intl

jue. 8/7

7:45 pm-12:31 pm

2 stops19h 46m

$280

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 7/15

7:17 am-3:00 pm

Nonstop4h 43m

Toronto Pearson Intl

vie. 7/18

4:45 pm-7:09 pm

Nonstop5h 24m

$286

PortlandMontreal

PDX - YUL

PDXYUL

Portland

lun. 8/4

3:25 pm-7:10 am

2 stops12h 45m

Montreal Pierre Elliott Trudeau Intl

mié. 8/13

7:00 am-1:05 pm

1 stop9h 05m

$286

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

vie. 9/26

7:15 am-7:49 pm

1 stop9h 34m

Toronto Island

mar. 9/30

12:25 pm-7:31 pm

1 stop10h 06m

$290

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

jue. 9/4

1:45 pm-12:22 am

1 stop7h 37m

Toronto Pearson Intl

mar. 9/9

4:45 pm-11:59 pm

1 stop10h 14m

$292

PortlandToronto

PDX - YYZ

PDXYYZ

Portland

vie. 7/18

11:07 pm-5:15 pm

1 stop15h 08m

Toronto Pearson Intl

lun. 7/21

6:24 pm-9:49 am

1 stop18h 25m

$298

PortlandOttawa

PDX - YOW

PDXYOW

Portland

sáb. 7/12

7:40 pm-8:19 am

1 stop9h 39m

Ottawa

mar. 7/22

6:00 pm-11:01 pm

1 stop8h 01m

$299

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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.

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 $243). Flying from State of Washington to Region of Ontario in July is currently the most expensive (average of $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 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 junio 12, 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 junio 12, 2025.

The most flights from USWA to CAON are scheduled on a Tuesday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 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 junio 12, 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
WestJet
7.2
Good
2,868 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 WestJet, which is currently one of the cheapest options available, starting at $101. Air Canada flights start at $113 while deals on American Airlines start at $121 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 $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.

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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 5 airlines flying from Washington to Ontario

Discover the top 5 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$135Average$535FlexibilityNo cancel feeOn-time67%
WestJetCheapest$145Average$401FlexibilityNo cancel feeOn-time60%
United AirlinesCheapest$158Average$672FlexibilityNo cancel feeOn-time69%
DeltaCheapest$170Average$507FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$267Average$522FlexibilityNo cancel feeOn-time75%

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