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$115+ Cheap flights from Seattle (SEA) 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YYZ
dic. 27 — ene. 31
vie. 12/27
vie. 1/3
1 adult, Economy
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Cheap flight deals from Seattle to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Ontario (CAON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 22, 2024.

Round-trip from

$262
(Kiwi.com)

One-way from

$115
(Mytrip)
From Seattle/Tacoma Intl to Ontario
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One-way flight from Seattle/Tacoma Intl to Ontario
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Find flight deals from Seattle to Ontario

Cheapest flights from Seattle to Ontario
Explore the most affordable flight options available from Seattle to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 22, 2024.

This Kiwi.com deal was found by Cheapflights users on 12/21. 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.
mar. 12/313:15 pmSEA - YYZ
1 stop12h 20mMultiple Airlines
dom. 1/59:00 pmYYZ - SEA
1 stop19h 11mMultiple Airlines
Deal found 12/21$497
This American Airlines deal was found by Cheapflights users on 12/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/285:30 amSEA - YYZ
1 stop14h 09mAmerican Airlines
sáb. 1/1811:46 amYYZ - SEA
1 stop10h 24mAmerican Airlines
Deal found 12/20$557
This Flightnetwork deal was found by Cheapflights users on 12/21. 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.
lun. 12/307:15 pmSEA - YYZ
2 stops13h 57mAir Canada
sáb. 1/188:00 amYYZ - SEA
1 stop9h 25mAir Canada
Deal found 12/21$561
This FlightHub deal was found by Cheapflights users on 12/21. 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.
mié. 12/257:45 pmSEA - YYZ
1 stop7h 30mWestJet
mar. 1/147:55 amYYZ - SEA
1 stop9h 26mWestJet
Deal found 12/21$601
This Booking.com deal was found by Cheapflights users on 12/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/285:45 amSEA - YOW
2 stops10h 13mAir Canada
lun. 1/66:00 pmYOW - SEA
2 stops18h 50mAir Canada
Deal found 12/21$609
This Alaska Airlines deal was found by Cheapflights users on 12/21. 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.
sáb. 12/287:26 amSEA - YYZ
Nonstop4h 41mAlaska Airlines
sáb. 1/114:20 pmYYZ - SEA
Nonstop5h 23mAlaska Airlines
Deal found 12/21$610
This Delta deal was found by Cheapflights users on 12/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/2511:35 amSEA - YYZ
2 stops8h 33mDelta
mar. 1/146:00 amYYZ - SEA
1 stop7h 45mDelta
Deal found 12/21$611
This United deal was found by Cheapflights users on 12/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/285:00 amSEA - YYZ
1 stop16h 17mUnited Airlines
sáb. 1/1112:25 pmYYZ - SEA
2 stops12h 35mUnited Airlines
Deal found 12/21$650
This Mytrip deal was found by Cheapflights users on 12/21. 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.
sáb. 12/287:15 pmSEA - YOW
2 stops11h 27mMultiple Airlines
lun. 1/69:35 pmYOW - SEA
3 stops19h 46mMultiple Airlines
Deal found 12/21$724
This Mytrip deal was found by Cheapflights users on 12/21. 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.
dom. 12/291:40 pmSEA - YKF
2 stops13h 35mMultiple Airlines
jue. 1/212:35 pmYKF - SEA
3 stops38h 35mMultiple Airlines
Deal found 12/21$881
This Mytrip deal was found by Cheapflights users on 12/22. 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.
dom. 12/291:40 pmSEA - YUL
3 stops22h 35mMultiple Airlines
dom. 1/54:00 pmYUL - SEA
2 stops24h 11mMultiple Airlines
Deal found 12/22$897
This United Airlines deal was found by Cheapflights users on 12/21. 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. 12/2711:51 pmSEA - YOW
1 stop14h 15mUnited Airlines
mar. 12/316:20 amYOW - SEA
2 stops17h 55mUnited Airlines
Deal found 12/21$947

Find flights from Seattle to Ontario within your budget

Customize your flight search to find flights from Seattle 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 diciembre 22, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 2/4

9:45 am-6:43 am

1 stop17h 58m

Toronto Pearson Intl

mar. 2/11

12:00 pm-12:19 am

2 stops15h 19m

$262

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

lun. 1/20

3:15 pm-6:00 am

2 stops11h 45m

Toronto Pearson Intl

lun. 1/27

7:55 am-2:21 pm

1 stop9h 26m

$264

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mié. 1/22

7:27 am-3:05 pm

Nonstop4h 38m

Toronto Pearson Intl

vie. 1/24

4:20 pm-6:43 pm

Nonstop5h 23m

$265

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mar. 2/4

6:05 am-1:50 pm

Nonstop4h 45m

Toronto Pearson Intl

mar. 2/11

7:05 pm-9:30 pm

Nonstop5h 25m

$290

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

lun. 1/13

5:23 pm-4:35 pm

1 stop20h 12m

Montreal Pierre Elliott Trudeau Intl

jue. 1/16

1:30 pm-12:19 am

2 stops13h 49m

$293

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 2/4

3:15 pm-4:48 pm

1 stop22h 33m

Ottawa

mar. 2/11

8:10 pm-2:21 pm

2 stops21h 11m

$300

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 2/4

7:50 pm-5:29 am

2 stops30h 39m

Ottawa

mar. 2/11

6:15 am-2:21 pm

1 stop11h 06m

$305

SeattleToronto

SEA - YTZ

SEAYTZ

Seattle/Tacoma Intl

mar. 2/4

9:45 am-6:53 pm

2 stops30h 08m

Toronto Island

mar. 2/11

2:00 pm-4:43 pm

3 stops29h 43m

$308

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

mié. 2/5

5:45 am-8:15 pm

2 stops11h 30m

Toronto Pearson Intl

mié. 2/12

7:05 pm-9:30 pm

Nonstop5h 25m

$313

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

lun. 3/10

10:55 pm-11:55 am

1 stop10h 00m

Toronto Pearson Intl

vie. 3/14

10:20 am-6:59 pm

1 stop11h 39m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/21

Showing 1-10 of 54 results
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Best time to book a flight from Seattle to Ontario

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

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

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Region of Ontario (average of $243). Flying from Seattle 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 SEA to ON?

Find hourly flight availability from Seattle 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 diciembre 22, 2024.

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

Weekly flight availability from Seattle to Region of Ontario

Explore weekly flight availability from Seattle 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 diciembre 22, 2024.

The most flights from SEA to CAON are scheduled on a Friday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 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 diciembre 22, 2024.
Read through reviews of airlines operating flights from Seattle to Ontario, such as Alaska Airlines, United Airlines and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

Alaska Airlines
8.0
Very good
9,537 reviews
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

Delta
8.0
Very good
8,594 reviews
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

United Airlines
7.4
Good
9,028 reviews
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

WestJet
7.3
Good
2,812 reviews
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,537 reviews

Boarding

8.2

Food

7.2

Comfort

7.9

Entertainment

7.1

Crew

8.5

Overall

8.0

Reviews

1 / 10

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Seattle to Ontario?

    For a flight from Seattle to Ontario, you will be flying from Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

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

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $119. WestJet flights start at $123 while deals on Air Canada start at $128 one-way.

  • What are the most popular routes from Seattle to Region of Ontario?

    The most popular route from Seattle to Region of Ontario is Seattle/Tacoma Intl - Toronto Pearson Intl. You may also consider Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl or Seattle/Tacoma Intl - Toronto Island.

  • What are the most reliable airlines from Seattle to Region of Ontario?

    The top 3 most reliable airlines when flying from Seattle to Region of Ontario are Qatar Airways (100%), Hawaiian Airlines (81%) and Alaska Airlines (80%).

  • What are the cheapest flights from Seattle to Region of Ontario?

    Looking for the cheapest flight from Seattle to Region of Ontario? While on average our users pay $833, our data indicates the cheapest price to be $111. The most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl), is priced around $250.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Region of Ontario (average of $243). Flying from Seattle 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 Seattle to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Seattle to Pearson Intl flights
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Seattle to Campbell River flights

Top 6 airlines flying from Seattle to Ontario

Discover the top 6 airlines that operate flights from Seattle 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 diciembre 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$172Average$556FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$176Average$532FlexibilityNo cancel feeOn-time67%
WestJetCheapest$235Average$514FlexibilityNo cancel feeOn-time60%
Alaska AirlinesCheapest$248Average$522FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$464Average$844FlexibilityNo cancel feeOn-time71%
DeltaCheapest$490Average$594FlexibilityNo cancel feeOn-timeN/A
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