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Cheap flights from Seattle (SEA) to Ontario from $139

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 8/12. 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.
SEA — YYZ
May 27 — Jun 31
From?
To?
Mon 5/27
Mon 6/3
1 adult, Economy
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How far in advance should I book a flight from Seattle to Region of Ontario?

Users have found that booking a flight from Seattle to Region of Ontario at least 27 days early can save you up to 88% on average compared to booking a flight this week. If booking 27 days before your flight isn’t an option for you, users have found flights from Seattle to Region of Ontario for as little as $713 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $752 for flights departing within the next 3 days.

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

Our data shows that January tends to be the cheapest month to fly to Region of Ontario from Seattle. Users have commonly found prices around $602 for the month, but tickets can be as low as $198. Due to multiple factors, prepare for potentially higher prices in December.

When is the cheapest time to fly from Seattle to Region of Ontario (SEA - ON)?

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.

Cheap Air Canada flights from Seattle to Ontario

Explore cheap flight options specifically provided by Air Canada for the route between Seattle and Ontario. 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 2,730,072 searches. Data last updated May 22, 2024.
Take a look at some of the lowest-priced Air Canada flights heading from Seattle to Ontario. Come back soon if you're not finding the exact deal you're looking for.
Tue 9/1711:10 pmSEA - YYZ
Nonstop4h 33mAir Canada
Tue 9/247:40 pmYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 5/21$387
Wed 11/137:05 pmSEA - YYZ
1 stop7h 57mAir Canada
Sat 11/166:40 pmYYZ - SEA
Nonstop5h 28mAir Canada
Deal found 5/21$392
Fri 9/67:40 amSEA - YTZ
1 stop9h 09mAir Canada
Mon 9/93:20 pmYTZ - SEA
1 stop8h 55mAir Canada
Deal found 5/22$431
Wed 9/187:40 amSEA - YTZ
1 stop10h 54mAir Canada
Thu 9/2612:20 pmYTZ - SEA
1 stop11h 55mAir Canada
Deal found 5/21$479
Wed 6/1210:40 amSEA - YOW
1 stop7h 11mAir Canada
Sat 6/155:30 amYOW - SEA
1 stop8h 13mAir Canada
Deal found 5/21$545
Thu 6/610:40 amSEA - YOW
1 stop7h 11mAir Canada
Mon 6/109:45 pmYOW - SEA
1 stop15h 12mAir Canada
Deal found 5/21$559
Thu 10/177:40 amSEA - YUL
Nonstop5h 07mAir Canada
Thu 10/246:30 pmYUL - SEA
Nonstop5h 45mAir Canada
Deal found 5/21$562
Thu 10/177:40 amSEA - YUL
Nonstop5h 07mAir Canada
Sat 10/269:10 amYUL - SEA
1 stop8h 20mAir Canada
Deal found 5/21$567
Sat 10/267:40 amSEA - YUL
Nonstop5h 07mAir Canada
Sat 11/26:15 pmYUL - SEA
Nonstop5h 59mAir Canada
Deal found 5/21$580

Cheap Delta flights from Seattle to Ontario

Explore cheap flight options specifically provided by Delta for the route between Seattle and Ontario. 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 2,730,072 searches. Data last updated May 22, 2024.
Some of the best deals we've found on Delta flights traveling from Seattle to Ontario. Ensure the flight price, dates, time, and airline match your criteria before you book.
Tue 6/1112:40 amSEA - YYZ
1 stop7h 58mDelta
Wed 6/1912:31 pmYYZ - SEA
1 stop11h 09mDelta
Deal found 5/22$405
Tue 6/1112:40 amSEA - YYZ
1 stop7h 58mDelta
Tue 6/2512:31 pmYYZ - SEA
1 stop11h 09mDelta
Deal found 5/22$412
Tue 6/1112:40 amSEA - YYZ
1 stop7h 58mDelta
Mon 6/245:52 pmYYZ - SEA
1 stop9h 07mDelta
Deal found 5/22$431
Fri 8/307:32 amSEA - YUL
2 stops12h 30mDelta
Mon 9/27:30 amYUL - SEA
2 stops13h 34mDelta
Deal found 5/21$550
Tue 6/47:10 amSEA - YUL
1 stop12h 41mDelta
Tue 6/113:20 pmYUL - SEA
1 stop10h 05mDelta
Deal found 5/21$552
Tue 5/2812:40 amSEA - YYZ
1 stop7h 59mDelta
Sun 6/25:55 pmYYZ - SEA
1 stop9h 04mDelta
Deal found 5/20$618
Tue 5/2812:40 amSEA - YYZ
1 stop7h 59mDelta
Tue 6/46:30 amYYZ - SEA
2 stops10h 41mDelta
Deal found 5/21$724
Wed 5/2912:40 amSEA - YUL
2 stops11h 34mDelta
Tue 6/410:00 amYUL - SEA
2 stops11h 25mDelta
Deal found 5/21$733
Thu 5/3012:40 amSEA - YYZ
1 stop7h 59mDelta
Sun 6/26:04 amYYZ - SEA
2 stops9h 30mDelta
Deal found 5/22$737

Cheap Seattle to Ontario flights in May & June 2024

Find cheap flight options from Seattle to Ontario specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Prices were last updated on May 22, 2024.
Scroll through some of the best deals on flights from Seattle to Ontario in 2024. Check back in a little while for more flight options.
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/1812:20 pmYYZ - SEA
1 stop11h 31mMultiple Airlines
Deal found 5/22$251
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/168:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$252
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/238:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$256
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/118:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 5/21$261
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/1812:20 pmYYZ - SEA
1 stop11h 31mMultiple Airlines
Deal found 5/22$266
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/118:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$267
Mon 6/39:40 pmSEA - YYZ
1 stop29h 55mMultiple Airlines
Tue 6/118:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$283
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/98:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$287
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sat 6/88:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$289

Seattle to Ontario 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Ontario in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,730,072 searches. Data last updated May 22, 2024.
Scroll through some of the best deals on flights from Seattle to Ontario in 2024. Check back in a little while for more flight options.
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/1812:20 pmYYZ - SEA
1 stop11h 31mMultiple Airlines
Deal found 5/22$251
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/168:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$252
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/238:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$256
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/118:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 5/21$261
Wed 6/128:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/1812:20 pmYYZ - SEA
1 stop11h 31mMultiple Airlines
Deal found 5/22$266
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Tue 6/118:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$267
Mon 6/39:40 pmSEA - YYZ
1 stop29h 55mMultiple Airlines
Tue 6/118:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$283
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sun 6/98:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$287
Wed 6/58:59 pmSEA - YYZ
1 stop30h 36mMultiple Airlines
Sat 6/88:20 pmYYZ - SEA
1 stop15h 12mMultiple Airlines
Deal found 5/22$289

Non-stop flights to Ontario from Seattle

Discover non-stop flight options from Seattle to Ontario. 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 2,730,072 searches. Data last updated May 22, 2024.
For a shorter flight, select one of these non-stop flights from Seattle to Ontario. Those looking to potentially save on 1 or 2-stop flights from Seattle to Ontario should utilize the search form at the the top of the page.
Tue 9/1711:10 pmSEA - YYZ
Nonstop4h 33mAir Canada
Tue 9/247:40 pmYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 5/21$387
Wed 9/1811:10 pmSEA - YYZ
Nonstop4h 33mAir Canada
Thu 9/267:40 pmYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 5/21$407
Wed 6/197:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Wed 6/263:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/22$417
Thu 9/511:35 amSEA - YYZ
Nonstop4h 33mAir Canada
Mon 9/97:40 pmYYZ - SEA
Nonstop5h 21mAir Canada
Deal found 5/22$426
Wed 6/126:50 amSEA - YYZ
Nonstop4h 40mAlaska Airlines
Fri 6/143:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/20$437
Wed 6/197:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Tue 6/253:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/22$447
Tue 6/187:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Tue 6/253:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/21$448
Thu 6/137:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Mon 6/173:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/21$456
Thu 6/137:00 amSEA - YYZ
Nonstop4h 30mAlaska Airlines
Tue 6/183:40 pmYYZ - SEA
Nonstop5h 20mAlaska Airlines
Deal found 5/21$467

Seattle to Ontario flights leaving soon

Find last-minute flight options from Seattle to Ontario 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 2,730,072 searches. Data last updated May 22, 2024.
Check out these flights departing soon from Seattle to Ontario. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
Tue 5/289:40 pmSEA - YYZ
1 stop22h 07mMultiple Airlines
Tue 6/48:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 5/21$334
Wed 5/299:40 pmSEA - YYZ
2 stops29h 10mMultiple Airlines
Sun 6/28:20 pmYYZ - SEA
1 stop27h 09mMultiple Airlines
Deal found 5/20$375
Wed 5/299:40 pmSEA - YYZ
1 stop29h 55mMultiple Airlines
Sun 6/28:20 pmYYZ - SEA
1 stop27h 09mMultiple Airlines
Deal found 5/20$376
Tue 5/289:40 pmSEA - YYZ
1 stop22h 07mMultiple Airlines
Wed 6/51:25 pmYYZ - SEA
1 stop9h 44mMultiple Airlines
Deal found 5/21$394
Thu 5/3012:45 pmSEA - YUL
1 stop20h 55mSun Country Air
Sun 6/23:15 pmYUL - SEA
1 stop27h 44mSun Country Air
Deal found 5/22$400
Wed 5/299:40 pmSEA - YYZ
1 stop29h 55mMultiple Airlines
Sun 6/28:20 pmYYZ - SEA
1 stop25h 50mMultiple Airlines
Deal found 5/22$406
Wed 5/299:40 pmSEA - YYZ
2 stops29h 10mMultiple Airlines
Sun 6/28:20 pmYYZ - SEA
1 stop25h 50mMultiple Airlines
Deal found 5/22$416
Tue 5/281:50 pmSEA - YYZ
2 stops14h 30mMultiple Airlines
Tue 6/48:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 5/21$419
Thu 5/3012:45 pmSEA - YUL
1 stop20h 55mMultiple Airlines
Wed 6/57:00 amYUL - SEA
1 stop8h 56mMultiple Airlines
Deal found 5/21$482

One-way flights to Ontario from Seattle

Search for one-way flight options from Seattle to Ontario. 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 2,730,072 searches. Data last updated May 22, 2024.
If you're seeking multiple options on one-way flights from Seattle to Ontario, be sure to check out these deals, which are updated often. Users in need of a round-trip flight from Seattle to Ontario instead should update the search form at the top of page.
Mon 8/127:00 amSEA - YKF
1 stop7h 23mWestJet
Deal found 5/22$139
Thu 7/181:50 pmSEA - YHM
1 stop7h 25mWestJet
Deal found 5/21$147
Wed 8/141:50 pmSEA - YHM
1 stop7h 25mWestJet
Deal found 5/22$154
Wed 7/105:15 pmSEA - YTZ
2 stops21h 56mMultiple Airlines
Deal found 5/21$154
Wed 8/141:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$154
Thu 9/51:50 pmSEA - YHM
1 stop7h 25mWestJet
Deal found 5/22$156
Thu 9/51:50 pmSEA - YKF
1 stop8h 02mWestJet
Deal found 5/22$156
Fri 7/191:50 pmSEA - YHM
1 stop7h 25mWestJet
Deal found 5/22$159
Thu 5/306:05 pmSEA - YUL
1 stop15h 35mSun Country Air
Deal found 5/21$163

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 2,730,072 searches. Data last updated May 22, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$251 - $437

Route

Depart

Return

Price

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 6/12

1 stop30h 36m

Toronto Pearson Intl

Tue 6/18

1 stop11h 31m

$251

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 6/12

1 stop30h 36m

Toronto Pearson Intl

Sun 6/16

1 stop15h 12m

$252

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 6/12

1 stop30h 36m

Toronto Pearson Intl

Sun 6/23

1 stop15h 12m

$256

Seattle/Tacoma IntlToronto Kitchener-Waterloo

SEA - YKF

SEAYKF

Seattle/Tacoma Intl

Thu 8/15

1 stop8h 02m

Toronto Kitchener-Waterloo

Sun 8/18

1 stop9h 41m

$319

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/17

Nonstop4h 33m

Toronto Pearson Intl

Tue 9/24

Nonstop5h 21m

$387

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 6/11

1 stop7h 58m

Toronto Pearson Intl

Wed 6/19

1 stop11h 09m

$405

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 11/13

1 stop8h 20m

Toronto Pearson Intl

Sat 11/16

1 stop16h 00m

$407

Seattle/Tacoma IntlMontreal Pierre Elliott Trudeau Intl

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 7/11

1 stop13h 17m

Montreal Pierre Elliott Trudeau Intl

Mon 7/15

1 stop14h 08m

$415

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 6/12

Nonstop4h 40m

Toronto Pearson Intl

Fri 6/14

Nonstop5h 20m

$437

Flights are sorted by cheapest first

Deals found on 5/22

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

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.

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 May 22, 2024.
Read through reviews of airlines operating flights from Seattle to Ontario, such as Air Canada, Delta and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Alaska Airlines
8.1
Very good
9,171 reviews
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

Delta
8.0
Very good
10,585 reviews
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

WestJet
7.5
Good
2,898 reviews
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

United Airlines
7.4
Good
10,870 reviews
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

American Airlines
7.3
Good
14,421 reviews
Alaska Airlines
8.1
Very good
9,171 reviews
Check prices

Entertainment

7.3

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Crew

8.6

Reviews

1 / 10

I paid for an aisle seat and found I was bumped to the middle seat. No entertainment at all, bathroom was so tiny, a woman had a hard time in there. Seems it was considered for men only. This was my first time on Alaska airlines. I don’t think I want to fly on Alaska Airlines again.

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.

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

    Yes, there are multiple flights from Seattle to Region of Ontario for under $300. The cheapest flight booked recently is on Multiple Airlines for just $251, but on average you can expect to pay $292.

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

    Cheapflights has at least 20 direct flights from Seattle to Region of Ontario under $400. A good price for a nonstop flight from Seattle to Region of Ontario is less than $471.

  • Are there last-minute flights available from Seattle to Region of Ontario for under $400?

    There are currently 20+ open flights from Seattle to Region of Ontario within the next 7 days for less than $400.

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

    Days when nonstop flights are available for this flight are: Sunday, Thursday.

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

    Travelers can expect 4 flights from Seattle to Region of Ontario on average per day.
    Early Morning (Midnight to 6am) - 25% of flight departures
    Evening (6pm - Midnight) - 75% of flight departures

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

    Departing from Seattle to Region of Ontario will take you 8h 02m. The distance between Seattle and Region of Ontario is about 2066 mi.

  • What are the cheapest airlines to fly from Seattle 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 $139. Sun Country Air flights start at $163 while deals on Delta start at $179 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 Kitchener-Waterloo.

  • 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 Air Canada (70%), Turkish Airlines (67%) and United Airlines (62%).

  • 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 $1,196, our data indicates the cheapest price to be $134. The most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl), is priced around $261.

  • What does SEA to YYZ mean?

    This is defined as Seattle/Tacoma Intl Airport (SEA) and Toronto Pearson Intl Airport (YYZ). Codes like Toronto Pearson Intl Airport are often used to just call airports uniquely. Ottawa Airport (YOW), Toronto Island Airport (YTZ), Hamilton Airport (YHM), London Airport (YXU), Toronto Kitchener-Waterloo Airport (YKF) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Seattle to Ontario 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 Seattle to Ontario with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Ontario 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 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.

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

    Many airlines flying from Seattle to Ontario 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 Seattle to Ontario?

    Yes, you can often find last-minute deals on Seattle to Ontario 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 Seattle to Region of Ontario flight deals updated?

    The Seattle to Region of Ontario flight deals you see on this page were last updated on 5/22.

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

    The most popular airlines flying from Seattle to Region of Ontario are American Airlines, Air Canada and Alaska Airlines. Something to consider prior to booking your flight.

  • When is the best time 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 $238). Flying from Seattle to Region of Ontario in July is currently the most expensive (average of $394). 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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See prices for flight routes from nearby airports that may be better suited for you.

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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 2,730,072 searches. Data last updated May 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$203Average$519FlexibilityNo cancel feeOn-time75%
Search Alaska Airlines flights
Air CanadaCheapest$225Average$642FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest$254Average$710FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapest$427Average$626FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapest$473Average$681FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$494Average$637FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
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Search flights from Seattle to Ontario by cabin class

Find flights from Seattle to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Seattle to Ontario

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 May 22, 2024.
1%of flight departuresEarly morningMidnight to 6 am
66%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
33%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Ontario, users can toggle the no change fees filter when performing a flight search.

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