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Cheap flights from Seattle (SEA) to Ontario from $97

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 9/10. 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
Jun 13 — Jun 201
From?
To?
Thu 6/13
Thu 6/20
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 November tends to be the cheapest month to fly to Region of Ontario from Seattle. Users have commonly found prices around $599 for the month, but tickets can be as low as $214. Due to multiple factors, prepare for potentially higher prices in December.

What is the cheapest time of day to fly from SEA to 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 Seattle to Ontario flights in June & July 2024

Find cheap flight options from Seattle to Ontario specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,045,324 searches. Prices were last updated on June 8, 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.
Tue 7/165:15 pmSEA - YYZ
1 stop10h 27mMultiple Airlines
Fri 7/198:00 pmYYZ - SEA
1 stop27h 23mMultiple Airlines
Deal found 6/7$320
Tue 7/235:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Mon 7/298:00 pmYYZ - SEA
1 stop27h 00mMultiple Airlines
Deal found 6/6$321
Mon 7/110:03 pmSEA - YYZ
1 stop29h 40mMultiple Airlines
Wed 7/1012:20 pmYYZ - SEA
1 stop10h 40mMultiple Airlines
Deal found 6/7$329
Tue 7/235:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Mon 7/298:00 pmYYZ - SEA
2 stops23h 15mMultiple Airlines
Deal found 6/6$337
Tue 7/165:10 amSEA - YYZ
1 stop15h 40mMultiple Airlines
Fri 7/198:00 pmYYZ - SEA
1 stop19h 26mMultiple Airlines
Deal found 6/7$339
Tue 7/165:15 pmSEA - YYZ
1 stop10h 27mMultiple Airlines
Wed 7/1712:00 pmYYZ - SEA
2 stops15h 35mMultiple Airlines
Deal found 6/6$340
Mon 7/110:03 pmSEA - YYZ
1 stop29h 40mMultiple Airlines
Mon 7/88:00 pmYYZ - SEA
1 stop15h 59mMultiple Airlines
Deal found 6/7$342
Tue 7/165:15 pmSEA - YYZ
1 stop10h 27mMultiple Airlines
Fri 7/1912:00 pmYYZ - SEA
2 stops15h 35mMultiple Airlines
Deal found 6/7$345
Mon 7/89:49 pmSEA - YYZ
1 stop21h 56mMultiple Airlines
Sat 7/139:45 pmYYZ - SEA
2 stops20h 01mMultiple Airlines
Deal found 6/8$346

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 3,045,324 searches. Data last updated June 8, 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.
Tue 9/176:37 pmSEA - YYZ
1 stop8h 58mMultiple Airlines
Tue 9/248:00 pmYYZ - SEA
1 stop17h 48mMultiple Airlines
Deal found 6/7$232
Tue 8/135:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Tue 8/2011:15 amYYZ - SEA
1 stop14h 09mMultiple Airlines
Deal found 6/7$286
Tue 9/172:21 pmSEA - YYZ
1 stop13h 16mMultiple Airlines
Tue 9/2411:15 amYYZ - SEA
2 stops12h 35mMultiple Airlines
Deal found 6/7$309
Tue 8/135:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Wed 8/2110:45 amYYZ - SEA
1 stop14h 39mMultiple Airlines
Deal found 6/7$313
Tue 7/165:15 pmSEA - YYZ
1 stop10h 27mMultiple Airlines
Fri 7/198:00 pmYYZ - SEA
1 stop27h 23mMultiple Airlines
Deal found 6/7$320
Tue 7/235:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Mon 7/298:00 pmYYZ - SEA
1 stop27h 00mMultiple Airlines
Deal found 6/6$321
Thu 8/153:30 pmSEA - YYZ
1 stop11h 04mMultiple Airlines
Thu 8/2211:15 amYYZ - SEA
1 stop14h 09mMultiple Airlines
Deal found 6/7$323
Mon 7/110:03 pmSEA - YYZ
1 stop29h 40mMultiple Airlines
Wed 7/1012:20 pmYYZ - SEA
1 stop10h 40mMultiple Airlines
Deal found 6/7$329
Fri 8/167:00 amSEA - YYZ
2 stops12h 54mMultiple Airlines
Tue 8/2011:15 amYYZ - SEA
1 stop14h 09mMultiple Airlines
Deal found 6/7$333

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 3,045,324 searches. Data last updated June 8, 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.
Mon 6/1710:03 pmSEA - YYZ
1 stop29h 32mMultiple Airlines
Sat 6/228:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 6/7$421
Sun 6/1610:58 pmSEA - YYZ
2 stops27h 47mMultiple Airlines
Wed 6/191:25 pmYYZ - SEA
1 stop22h 07mMultiple Airlines
Deal found 6/7$452
Sat 6/1510:26 pmSEA - YYZ
2 stops45h 36mMultiple Airlines
Tue 6/1812:20 pmYYZ - SEA
1 stop11h 31mMultiple Airlines
Deal found 6/7$465
Mon 6/1710:03 pmSEA - YUL
2 stops36h 07mMultiple Airlines
Mon 6/2411:45 amYUL - SEA
1 stop26h 17mMultiple Airlines
Deal found 6/7$466
Mon 6/178:59 pmSEA - YYZ
2 stops21h 01mMultiple Airlines
Sat 6/228:00 pmYYZ - SEA
1 stop15h 32mMultiple Airlines
Deal found 6/7$476
Thu 6/137:49 pmSEA - YYZ
2 stops24h 13mMultiple Airlines
Sun 6/168:20 pmYYZ - SEA
2 stops27h 53mMultiple Airlines
Deal found 6/6$482
Tue 6/187:00 amSEA - YYZ
2 stops11h 00mWestJet
Tue 6/257:00 amYYZ - SEA
1 stop13h 21mWestJet
Deal found 6/7$485
Mon 6/1710:03 pmSEA - YUL
2 stops36h 07mMultiple Airlines
Thu 6/209:10 pmYUL - SEA
1 stop26h 11mMultiple Airlines
Deal found 6/7$499
Sat 6/1510:07 amSEA - YYZ
1 stop28h 25mSun Country Air
Sun 7/142:55 pmYYZ - SEA
1 stop20h 17mSun Country Air
Deal found 6/7$500

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 3,045,324 searches. Data last updated June 8, 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.
Tue 9/102:21 pmSEA - YYZ
1 stop13h 22mMultiple Airlines
Deal found 6/7$97
Mon 7/89:49 pmSEA - YYZ
1 stop29h 46mMultiple Airlines
Deal found 6/7$105
Tue 9/109:14 amSEA - YYZ
2 stops18h 29mMultiple Airlines
Deal found 6/7$112
Wed 7/245:10 amSEA - YYZ
1 stop14h 35mMultiple Airlines
Deal found 6/7$130
Wed 7/318:55 pmSEA - YYZ
2 stops30h 47mMultiple Airlines
Deal found 6/7$136
Mon 9/99:14 amSEA - YTZ
2 stops31h 47mMultiple Airlines
Deal found 6/7$142
Mon 9/93:30 pmSEA - YKF
1 stop17h 40mMultiple Airlines
Deal found 6/7$146
Thu 7/259:21 pmSEA - YYZ
1 stop23h 54mMultiple Airlines
Deal found 6/7$147
Mon 9/91:10 pmSEA - YKF
2 stops14h 30mMultiple Airlines
Deal found 6/7$149

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 3,045,324 searches. Data last updated June 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$232 - $521

Route

Depart

Return

Price

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/17

1 stop8h 58m

Toronto Pearson Intl

Tue 9/24

1 stop17h 48m

$232

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 8/13

1 stop14h 35m

Toronto Pearson Intl

Tue 8/20

1 stop14h 09m

$286

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/17

1 stop13h 16m

Toronto Pearson Intl

Tue 9/24

2 stops12h 35m

$309

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Fri 7/19

2 stops11h 00m

Toronto Pearson Intl

Thu 7/25

2 stops12h 52m

$366

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Tue 9/17

Nonstop4h 30m

Toronto Pearson Intl

Tue 9/24

Nonstop5h 22m

$387

Seattle/Tacoma IntlToronto Pearson Intl

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

Wed 9/18

1 stop9h 21m

Toronto Pearson Intl

Thu 9/26

1 stop7h 40m

$431

Seattle/Tacoma IntlMontreal Pierre Elliott Trudeau Intl

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Wed 7/24

1 stop15h 46m

Montreal Pierre Elliott Trudeau Intl

Fri 8/2

1 stop14h 08m

$443

Seattle/Tacoma IntlOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Fri 8/2

1 stop8h 48m

Ottawa

Thu 8/15

1 stop8h 10m

$482

Seattle/Tacoma IntlOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

Thu 6/20

1 stop8h 10m

Ottawa

Wed 6/26

1 stop8h 29m

$521

Flights are sorted by cheapest first

Deals found on 6/7

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 June 8, 2024.
Read through reviews of airlines operating flights from Seattle to Ontario, such as Delta, WestJet and Alaska 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
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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
9,236 reviews
Alaska Airlines
8.1
Very good
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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
10,333 reviews
Alaska Airlines
8.1
Very good
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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.

Finnair
7.8
Good
1,362 reviews
Alaska Airlines
8.1
Very good
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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
2,853 reviews
Alaska Airlines
8.1
Very good
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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
10,680 reviews
Alaska Airlines
8.1
Very good
9,236 reviews

Crew

8.6

Food

7.3

Boarding

8.2

Entertainment

7.3

Overall

8.1

Comfort

7.9

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 $232, but on average you can expect to pay $326.

  • 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 $488.

  • Are there last-minute flights available from Seattle to Region of Ontario for under $500?

    There are currently 20+ open flights from Seattle to Region of Ontario within the next 7 days for less than $500.

  • 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 $169. WestJet flights start at $170 while deals on Sun Country Air start at $178 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 - Hamilton.

  • 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 Alaska Airlines (82%), Air Canada (68%) and United Airlines (64%).

  • 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 $843, our data indicates the cheapest price to be $172. The most popular route (Seattle/Tacoma Intl - Toronto Pearson Intl), is priced around $232.

  • 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), Hamilton Airport (YHM), Toronto Island Airport (YTZ), Toronto Kitchener-Waterloo Airport (YKF), London Airport (YXU) 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 6/7.

  • 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.

  • 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 $237). Flying from Seattle to Region of Ontario in July is currently the most expensive (average of $387). 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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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 3,045,324 searches. Data last updated June 8, 2024.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$201Average$521FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$203Average$660FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$218Average$638FlexibilityNo cancel feeOn-time67%
WestJetCheapest$417Average$650FlexibilityNo cancel feeOn-time60%
American AirlinesCheapest$465Average$617FlexibilityNo cancel feeOn-time71%
DeltaCheapest$470Average$603FlexibilityNo cancel feeOn-timeN/A
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Jacksonville to Miami flights
Philadelphia to Tampa flights
Orlando to Los Angeles flights
Los Angeles to Bali flights
Miami to Boston flights
Miami to Cancún flights
Orlando to Baltimore flights
Denver to Hawaii flights
Cincinnati to Chicago flights
Seattle to Cap Haitien flights

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.
First Class
Business Class
Prem Econ Class
Economy Class

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 June 8, 2024.
18%of flight departuresEarly morningMidnight to 6 am
52%of flight departuresMorning6 am to noon
0%of flight departuresAfternoonNoon to 6 pm
30%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

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