HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Ontario to Seattle (SEA) from $158

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 6/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
YYZ — SEA
jun. 4 — jun. 111
From?
To?
mar. 6/4
mar. 6/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

How far in advance should I book a flight from Region of Ontario to Seattle?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 51 days in advance, which can save you up to 75% on flights from Region of Ontario to Seattle compared to booking the week you need them. Waiting 51 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $571. For sooner than that we have options available in the next 3 days from $673.

What is the cheapest month to fly from Region of Ontario to Seattle?

October can be a great time to fly to Seattle from Region of Ontario with a flight ticket averaging about $522. Cheapflights users have found deals in the month of October for as cheap as $333. The most expensive prices can be found in the month of December.

What is the cheapest time of day to fly from ON to SEA?

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

Cheap American Airlines flights from Ontario to Seattle

Explore cheap flight options specifically provided by American Airlines for the route between Ontario and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Take a peek at the cheapest American Airlines flights we've detected traveling from Ontario to Seattle. Make sure to double check the flight details before booking.
mié. 6/2611:55 amYYZ - SEA
1 stop10h 53mAmerican Airlines
mié. 7/35:55 pmSEA - YYZ
1 stop15h 39mAmerican Airlines
Deal found 5/29$453
mar. 8/67:50 amYUL - SEA
2 stops12h 52mAmerican Airlines
mié. 8/145:55 pmSEA - YUL
1 stop18h 04mAmerican Airlines
Deal found 5/29$475
vie. 6/76:00 amYYZ - SEA
1 stop16h 27mAmerican Airlines
sáb. 6/812:20 amSEA - YYZ
1 stop9h 14mAmerican Airlines
Deal found 5/30$494
vie. 6/76:00 amYYZ - SEA
1 stop16h 27mAmerican Airlines
dom. 6/91:14 amSEA - YYZ
1 stop8h 20mAmerican Airlines
Deal found 5/29$497
sáb. 6/86:00 amYYZ - SEA
1 stop15h 06mAmerican Airlines
sáb. 6/1512:20 amSEA - YYZ
1 stop9h 14mAmerican Airlines
Deal found 5/30$498
sáb. 6/81:24 pmYYZ - SEA
2 stops10h 19mAmerican Airlines
dom. 6/1610:52 pmSEA - YYZ
1 stop9h 23mAmerican Airlines
Deal found 5/30$509
jue. 8/292:40 pmYUL - SEA
2 stops11h 25mAmerican Airlines
lun. 9/211:38 pmSEA - YUL
1 stop7h 51mAmerican Airlines
Deal found 5/29$516
vie. 6/76:00 amYYZ - SEA
1 stop16h 27mAmerican Airlines
sáb. 6/1510:52 pmSEA - YYZ
1 stop10h 48mAmerican Airlines
Deal found 5/30$569

Cheap Delta flights from Ontario to Seattle

Explore cheap flight options specifically provided by Delta for the route between Ontario and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Have a look at some of the cheapest available Delta flights departing from Ontario and landing in Seattle. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
mar. 10/15:50 pmYYZ - SEA
1 stop9h 09mDelta
mié. 10/3012:35 amSEA - YYZ
1 stop8h 00mDelta
Deal found 5/29$354
dom. 6/165:52 pmYYZ - SEA
1 stop9h 07mDelta
mar. 6/256:00 amSEA - YYZ
1 stop12h 59mDelta
Deal found 5/30$376
mar. 6/256:30 amYYZ - SEA
1 stop9h 26mDelta
mié. 7/35:30 amSEA - YYZ
1 stop8h 11mDelta
Deal found 5/29$409
dom. 6/95:52 pmYYZ - SEA
1 stop9h 07mDelta
lun. 6/1712:25 amSEA - YYZ
1 stop8h 13mDelta
Deal found 5/29$414
dom. 9/16:00 amYUL - SEA
2 stops9h 02mDelta
sáb. 9/79:00 amSEA - YUL
2 stops11h 01mDelta
Deal found 5/28$431
mar. 8/277:30 amYUL - SEA
2 stops11h 54mDelta
mié. 9/49:55 amSEA - YUL
2 stops10h 15mDelta
Deal found 5/29$436
sáb. 6/85:58 pmYYZ - SEA
1 stop7h 01mDelta
jue. 7/49:55 pmSEA - YYZ
1 stop11h 15mDelta
Deal found 5/29$456
vie. 6/75:52 pmYYZ - SEA
1 stop9h 07mDelta
sáb. 6/157:00 amSEA - YYZ
1 stop7h 21mDelta
Deal found 5/29$556
mar. 6/46:04 amYYZ - SEA
1 stop11h 05mDelta
lun. 6/1012:40 amSEA - YYZ
1 stop7h 58mDelta
Deal found 5/30$560

Cheap Ontario to Seattle flights in May & June 2024

Find cheap flight options from Ontario to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on mayo 30, 2024.
Scroll through some of the best deals on flights from Ontario to Seattle in 2024. Check back in a little while for more flight options.
mié. 6/191:25 pmYYZ - SEA
1 stop9h 44mMultiple Airlines
lun. 6/2410:03 pmSEA - YYZ
1 stop21h 42mMultiple Airlines
Deal found 5/29$318
mar. 6/412:20 pmYYZ - SEA
1 stop23h 12mMultiple Airlines
mar. 6/119:49 amSEA - YYZ
1 stop17h 46mMultiple Airlines
Deal found 5/29$324
vie. 6/141:25 pmYYZ - SEA
1 stop9h 44mMultiple Airlines
lun. 6/1710:03 pmSEA - YYZ
1 stop29h 42mMultiple Airlines
Deal found 5/29$333
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/139:28 amSEA - YYZ
1 stop10h 19mMultiple Airlines
Deal found 5/29$346
mar. 6/187:00 amYYZ - SEA
1 stop8h 56mWestJet
mar. 11/51:50 pmSEA - YYZ
1 stop7h 27mWestJet
Deal found 5/29$360
mar. 6/118:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
lun. 6/178:59 pmSEA - YYZ
2 stops21h 01mMultiple Airlines
Deal found 5/28$365
dom. 6/308:00 pmYYZ - SEA
1 stop15h 37mMultiple Airlines
sáb. 7/62:51 pmSEA - YYZ
1 stop12h 52mMultiple Airlines
Deal found 5/28$367
jue. 6/138:20 pmYYZ - SEA
1 stop15h 17mMultiple Airlines
lun. 6/177:00 amSEA - YYZ
2 stops20h 35mMultiple Airlines
Deal found 5/29$369
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/133:19 pmSEA - YYZ
2 stops12h 16mMultiple Airlines
Deal found 5/29$370

Ontario to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Scroll through some of the best deals on flights from Ontario to Seattle in 2024. Check back in a little while for more flight options.
mié. 9/256:15 amYKF - SEA
1 stop9h 41mWestJet
mié. 10/27:00 amSEA - YKF
1 stop7h 28mWestJet
Deal found 5/30$285
mié. 9/186:15 amYKF - SEA
1 stop9h 41mWestJet
lun. 9/237:00 amSEA - YKF
1 stop7h 28mWestJet
Deal found 5/29$304
jue. 9/196:00 amYHM - SEA
1 stop9h 56mWestJet
mar. 9/247:00 amSEA - YHM
1 stop7h 13mWestJet
Deal found 5/29$313
mié. 6/191:25 pmYYZ - SEA
1 stop9h 44mMultiple Airlines
lun. 6/2410:03 pmSEA - YYZ
1 stop21h 42mMultiple Airlines
Deal found 5/29$318
vie. 9/2712:00 pmYYZ - SEA
2 stops11h 26mWestJet
dom. 10/61:50 pmSEA - YYZ
1 stop7h 30mWestJet
Deal found 5/29$320
mié. 9/258:05 amYYZ - SEA
1 stop7h 25mAir Canada
sáb. 10/511:30 amSEA - YYZ
Nonstop4h 33mAir Canada
Deal found 5/29$321
sáb. 9/2812:00 pmYYZ - SEA
2 stops11h 26mWestJet
mar. 10/151:50 pmSEA - YYZ
1 stop7h 30mWestJet
Deal found 5/29$322
jue. 9/1912:00 pmYYZ - SEA
2 stops11h 26mWestJet
mar. 9/247:00 amSEA - YYZ
1 stop7h 22mWestJet
Deal found 5/29$323
mié. 9/256:05 pmYHM - SEA
1 stop21h 51mWestJet
mié. 10/27:00 amSEA - YHM
1 stop7h 13mWestJet
Deal found 5/30$324

Non-stop flights to Seattle from Ontario

Discover non-stop flight options from Ontario to Seattle. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Consider booking one of these non-stop flights heading from Ontario to Seattle. Search for alternative flights from Ontario to Seattle by utilizing the search form above.
lun. 7/157:40 pmYYZ - SEA
Nonstop5h 18mAir Canada
sáb. 10/1211:10 pmSEA - YYZ
Nonstop4h 33mAir Canada
Deal found 5/29$377
sáb. 8/243:40 pmYYZ - SEA
Nonstop5h 22mAlaska Airlines
sáb. 10/57:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/29$387
mar. 8/67:40 pmYYZ - SEA
Nonstop5h 18mAir Canada
mié. 8/2111:40 amSEA - YYZ
Nonstop4h 40mAir Canada
Deal found 5/29$392
lun. 8/57:40 pmYYZ - SEA
Nonstop5h 18mAir Canada
mié. 8/2111:40 amSEA - YYZ
Nonstop4h 40mAir Canada
Deal found 5/29$420
mié. 6/193:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
mié. 6/267:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/29$428
mié. 6/263:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
vie. 7/57:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/29$430
dom. 6/163:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
mar. 6/257:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/30$436
vie. 6/213:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
vie. 7/57:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/29$437
jue. 8/153:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
lun. 8/197:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Deal found 5/30$438

Ontario to Seattle flights leaving soon

Find last-minute flight options from Ontario to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Book one of these great deals on flights from Ontario to Seattle. To prevent any unwanted surprises, users should verify their flight info before booking.
dom. 6/98:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
mar. 6/189:49 amSEA - YYZ
1 stop9h 56mMultiple Airlines
Deal found 5/29$295
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/1310:58 pmSEA - YYZ
1 stop28h 44mMultiple Airlines
Deal found 5/30$317
mar. 6/412:20 pmYYZ - SEA
1 stop23h 12mMultiple Airlines
mar. 6/119:49 amSEA - YYZ
1 stop17h 46mMultiple Airlines
Deal found 5/29$324
mar. 6/48:20 pmYYZ - SEA
2 stops20h 02mMultiple Airlines
mar. 6/119:41 pmSEA - YYZ
1 stop19h 11mMultiple Airlines
Deal found 5/30$327
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/1310:58 pmSEA - YYZ
1 stop28h 44mMultiple Airlines
Deal found 5/30$330
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/139:28 amSEA - YYZ
1 stop10h 19mMultiple Airlines
Deal found 5/29$346
mar. 6/412:20 pmYYZ - SEA
1 stop11h 09mMultiple Airlines
mar. 6/119:41 pmSEA - YYZ
1 stop19h 11mMultiple Airlines
Deal found 5/30$350
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/133:19 pmSEA - YYZ
2 stops12h 16mMultiple Airlines
Deal found 5/30$366
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
jue. 6/133:19 pmSEA - YYZ
2 stops12h 16mMultiple Airlines
Deal found 5/30$369

One-way flights to Seattle from Ontario

Search for one-way flight options from Ontario to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated mayo 30, 2024.
Take a look at some of the best available options we've come across on one-way flights from Ontario to Seattle. For those needing a return trip from Ontario, there is a search form available above.
mar. 6/189:35 amYYZ - SEA
1 stop14h 16mMultiple Airlines
Deal found 5/28$158
mié. 10/236:15 amYKF - SEA
1 stop9h 41mWestJet
Deal found 5/29$159
jue. 6/138:20 pmYYZ - SEA
1 stop15h 17mMultiple Airlines
Deal found 5/29$159
jue. 6/68:20 pmYYZ - SEA
1 stop27h 36mMultiple Airlines
Deal found 5/29$160
mar. 8/2012:20 pmYYZ - SEA
1 stop9h 41mMultiple Airlines
Deal found 5/30$166
mar. 8/206:15 amYKF - SEA
1 stop9h 41mWestJet
Deal found 5/30$171
mié. 10/2312:00 pmYYZ - SEA
2 stops11h 26mWestJet
Deal found 5/29$171
mié. 8/216:00 amYHM - SEA
1 stop9h 56mWestJet
Deal found 5/29$172
sáb. 6/158:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/29$172

Find flights from Ontario to Seattle within your budget

Customize your flight search to find flights from Ontario to Seattle 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 2,784,634 searches. Data last updated mayo 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$272 - $557

Route

Depart

Return

Price

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

jue. 6/13

1 stop15h 17m

Seattle/Tacoma Intl

lun. 6/17

1 stop29h 42m

$272

Toronto Kitchener-WaterlooSeattle/Tacoma Intl

YKF - SEA

YKFSEA

Toronto Kitchener-Waterloo

mié. 9/25

1 stop9h 41m

Seattle/Tacoma Intl

mié. 10/2

1 stop7h 28m

$285

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 6/11

1 stop14h 16m

Seattle/Tacoma Intl

lun. 6/17

1 stop18h 17m

$288

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 9/25

Nonstop5h 22m

Seattle/Tacoma Intl

mié. 10/2

Nonstop4h 30m

$316

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 9/25

1 stop7h 25m

Seattle/Tacoma Intl

sáb. 10/5

Nonstop4h 33m

$321

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 10/1

Nonstop5h 21m

Seattle/Tacoma Intl

mié. 10/9

1 stop7h 11m

$325

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mar. 10/1

1 stop9h 09m

Seattle/Tacoma Intl

mié. 10/30

1 stop8h 00m

$354

Toronto Pearson IntlSeattle/Tacoma Intl

YYZ - SEA

YYZSEA

Toronto Pearson Intl

mié. 6/26

1 stop10h 53m

Seattle/Tacoma Intl

mié. 7/3

1 stop15h 39m

$453

Montreal Pierre Elliott Trudeau IntlSeattle/Tacoma Intl

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

vie. 6/21

1 stop14h 12m

Seattle/Tacoma Intl

dom. 6/23

1 stop7h 42m

$557

Flights are sorted by cheapest first

Deals found on 5/29

No data available for this route at this time. Please check back soon.

Best time to book a flight from Ontario to Seattle

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated mayo 30, 2024.
Read reviews from past customers who have flown American Airlines, Delta and Air Canada from Ontario to Seattle. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Alaska Airlines
8.1
Very good
9,192 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Delta
8.0
Very good
10,457 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Aeromexico
7.6
Good
2,489 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

WestJet
7.5
Good
2,869 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

United Airlines
7.4
Good
10,777 reviews
Alaska Airlines
8.1
Very good
9,192 reviews
Check prices

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Seattle. 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 into for flights to Seattle from Ontario?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Ontario to Seattle.

  • Can I find flights from Region of Ontario to Seattle for under $300 on Cheapflights?

    Yes, there are multiple flights from Region of Ontario to Seattle for under $300. The cheapest flight booked recently is on Multiple Airlines for just $272, but on average you can expect to pay $303.

  • Are there nonstop flights from Region of Ontario to Seattle for under $400 on Cheapflights?

    Cheapflights has at least 20 direct flights from Region of Ontario to Seattle under $400. A good price for a nonstop flight from Region of Ontario to Seattle is less than $438.

  • Are there last-minute flights available from Region of Ontario to Seattle for under $300?

    There are currently 20+ open flights from Region of Ontario to Seattle within the next 7 days for less than $300.

  • What days are nonstop flights available from Region of Ontario to Seattle?

    Nonstop flights are available for this route on the following days: Friday.

  • How many flights depart from Region of Ontario to Seattle on average per day?

    Travelers can expect 1 flight from Region of Ontario to Seattle on average per day.
    Afternoon (Noon - 6pm) - 100% of flight departures

  • How long is the flight from Region of Ontario to Seattle?

    WestJet, Alaska Airlines, and Air Canada can get you from Region of Ontario to Seattle in just under 5h 22m. Your travel time can differ by up to 4h 19m. Airlines will cover a distance of 2066 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    When deciding which route to take from Region of Ontario to Seattle consider Toronto Pearson Intl - Seattle/Tacoma Intl, Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl or Toronto Island - Seattle/Tacoma Intl as they are the most popular.

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

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to Seattle consider choosing Air Canada (49%), United Airlines (49%) or Brussels Airlines (20%) as they are the most reliable in getting you off to your destination on time.

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

    On average you can expect to pay $440 for a flight from Region of Ontario to Seattle. The cheapest flight overall is $184 while the most popular route, (Toronto Pearson Intl - Seattle/Tacoma Intl) is currently priced at $272.

  • What does YYZ to SEA mean?

    Great question - YYZ to SEA just means Toronto Pearson Intl Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights! While you’re still figuring out your travel plans, it’s not a bad idea to learn the names and codes of other airports around these areas: Ottawa Airport (YOW), Hamilton Airport (YHM), Toronto Island Airport (YTZ), Toronto Kitchener-Waterloo Airport (YKF), London Airport (YXU).

  • Can I find deals for flights from Ontario to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to Seattle that allow pets onboard?

    Many airlines flying from Ontario to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to Seattle?

    Yes, you can often find last-minute deals on Ontario to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Region of Ontario to Seattle flight deals updated?

    The Region of Ontario to Seattle flight deals you see on this page were last updated on 5/30.

  • What are the most popular airlines that fly from Region of Ontario to Seattle?

    Consider American Airlines, Air Canada or Alaska Airlines when booking your flight. These represent the most popular airlines when flying from Region of Ontario to Seattle.

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

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to Seattle (average of $247). Flying from Region of Ontario to Seattle in July is currently the most expensive (average of $406). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Seattle
See prices for flight routes from nearby airports that may be better suited for you.

Pearson Intl to Seattle flights
Edmonton to Seattle flights
Vancouver Intl to Seattle flights
Pierre Elliott Trudeau Intl to Seattle flights
Calgary to Seattle flights
Vancouver Intl to Portland flights
Pearson Intl to Portland flights
Kitchener-Waterloo to Seattle flights
Pierre Elliott Trudeau Intl to Portland flights
Calgary to Portland flights
Winnipeg to Seattle flights
Québec City to Seattle flights
Ottawa to Seattle flights
Edmonton to Portland flights
Victoria to Seattle flights
Saskatoon to Seattle flights
Hamilton to Portland flights
Halifax to Seattle flights
Pearson Intl to Spokane flights
Ottawa to Portland flights
London to Seattle flights
Kelowna to Seattle flights
Victoria to Portland flights
Winnipeg to Portland flights
Toronto Island to Portland flights
Regina to Seattle flights
Vancouver Intl to Spokane flights
Calgary to Spokane flights
Prince George to Seattle flights
Fort St. John to Portland flights
Pierre Elliott Trudeau Intl to Spokane flights
Kelowna to Portland flights
London to Portland flights
Saskatoon to Portland flights
Kamloops to Portland flights
St John to Portland flights
Windsor to Portland flights
Pierre Elliott Trudeau Intl to Pasco flights
Kingston to Seattle flights

Top 6 airlines flying from Ontario to Seattle

Discover the top 6 airlines that operate flights from Ontario to Seattle. 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 2,784,634 searches. Data last updated mayo 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$248Average$460FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapest$331Average$522FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
WestJetCheapest$374Average$567FlexibilityNo cancel feeOn-time60%
Search WestJet flights
American AirlinesCheapest$402Average$464FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapest$406Average$518FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$412Average$592FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Dallas to Las Vegas flights
Detroit to Orlando flights
New York to Guyana flights
New York to Atlanta flights
Los Angeles to Minneapolis flights
USA to Zurich flights
Nashville to Knoxville flights
Philadelphia to Boston flights
Orlando to Phoenix flights
USA to Israel flights
USA to Bali flights
Region of Ontario to San Francisco flights

Search flights from Ontario to Seattle by cabin class

Find flights from Ontario to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to Seattle

Find hourly flight availability from Ontario to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated mayo 30, 2024.
1%of flight departuresEarly morningMidnight to 6 am
45%of flight departuresMorning6 am to noon
16%of flight departuresAfternoonNoon to 6 pm
38%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Laayoune Hassan I
Flights to Virac
Flights to Figari-Sud Corse
Flights to Edremit/Korfez
Flights to Rhinelander Oneida County
Flights to Girona Costa Brava
Flights to Brainerd Crow Wing County
Flights to Parikia Paros
Flights to Cortez Montezuma County
Flights to Miyakojima Hirara
Flights to Zadar
Flights to Trapani Birgi
Flights to Provincetown
Flights to Oran Es Senia
Flights to Constanţa Mihail Kogalniceanu
Flights to Vava'u Lupepau'U
Flights to Urumqi
Flights to Hakodate
Flights to Naxos
Flights to Dalaman
Flights to Hyannis Barnstable
Flights to Devils Lake
Flights to Bastia Poretta
Flights to Karpathos

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 Ontario to Seattle?

When you search for this flight from Ontario to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to Seattle.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Seattle flexibly with Cheapflights today.

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

Not ready to book yet? You can track prices for flights from Ontario to Seattle on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines