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Cheap flights from Ontario to Seattle from $134

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Seattle departing on 1/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Seattle

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to Seattle that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to Seattle.

Cheap last minute flights

Planning a quick getaway from Ontario to Seattle? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Seattle, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to Seattle

Find recent round-trip train or bus tickets from Ontario to Seattle.

All round-trip flight deals to Seattle

The cheapest plane tickets to Seattle found on KAYAK recently.
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$229Alaska Airlines
Find Deal
Fri, Jan 17 - Thu, Jan 23
8:00 am - 2:30 pmYYZ-SEA
9h 30m1 stop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$234Air Canada
Find Deal
Wed, Jan 22 - Thu, Jan 23
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$235Air Canada
Find Deal
Tue, Jan 21 - Tue, Jan 28
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$241Alaska Airlines
Find Deal
Wed, Jan 29 - Tue, Feb 4
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$242United Airlines
Find Deal
Fri, Feb 14 - Mon, Feb 17
7:40 am - 2:21 pmYYZ-SEA
9h 41m1 stop
3:15 pm - 5:58 amSEA-YYZ
11h 43m2 stops
$245WestJet
Find Deal
Wed, Feb 12 - Wed, Mar 12
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
11:59 pm - 9:58 amSEA-YYZ
6h 59m1 stop
$251United Airlines
Find Deal
Thu, Feb 6 - Mon, Feb 24
7:55 am - 2:21 pmYYZ-SEA
9h 26m1 stop
11:30 am - 12:26 amSEA-YYZ
9h 56m2 stops
$260WestJet
Find Deal
Tue, Jan 14 - Fri, Jan 17
5:00 pm - 12:50 amYYZ-SEA
10h 50m1 stop
6:00 am - 7:09 pmSEA-YYZ
10h 09m1 stop
$262Delta
Find Deal
Fri, Jan 17 - Mon, Jan 20
1:20 pm - 10:25 pmYYZ-SEA
12h 05m1 stop
6:00 am - 7:09 pmSEA-YYZ
10h 09m1 stop
$263Delta
Find Deal
Sun, Jan 26 - Fri, Jan 31
7:55 am - 2:21 pmYYZ-SEA
9h 26m1 stop
$134WestJet
Find Deal
Mon, Jan 27
9:00 am - 2:21 pmYYZ-SEA
8h 21m1 stop
$139WestJet
Find Deal
Sun, Jan 19
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
$141Air Canada
Find Deal
Thu, Feb 27
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
$145Alaska Airlines
Find Deal
Thu, Jan 30
8:00 pm - 10:23 amYYZ-SEA
17h 23m1 stop
Sun, Feb 23
2:00 pm - 5:00 pmYTZ-SEA
30h 00m3 stops
Tue, Jan 14
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
$155Air Canada
Find Deal
Fri, Feb 14
5:00 pm - 12:50 amYYZ-SEA
10h 50m1 stop
$157Delta
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Thu, Jan 30
5:15 pm - 10:55 pmYYZ-SEA
8h 40m1 stop
$158Delta
Find Deal
Sat, Jan 25
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
$208Alaska Airlines
Find Deal
Sun, Jan 26
8:15 pm - 1:10 pmYYZ-SEA
19h 55m2 stops
2:16 pm - 6:46 amSEA-YYZ
13h 30m1 stop
Tue, Dec 31 - Wed, Jan 8
10:35 pm - 5:52 pmYYZ-SEA
22h 17m2 stops
2:16 pm - 6:46 amSEA-YYZ
13h 30m1 stop
Wed, Jan 1 - Wed, Jan 8
6:00 am - 12:49 pmYYZ-SEA
9h 49m1 stop
7:11 am - 6:26 pmSEA-YYZ
8h 15m1 stop
$502American Airlines
Find Deal
Thu, Jan 2 - Tue, Jan 21
2:10 pm - 9:20 pmYOW-SEA
10h 10m1 stop
5:45 am - 4:00 pmSEA-YOW
7h 15m1 stop
$539Air Canada
Find Deal
Tue, Dec 31 - Tue, Jan 7
6:15 am - 5:00 pmYOW-SEA
13h 45m2 stops
3:15 pm - 5:33 amSEA-YOW
11h 18m2 stops
$551WestJet
Find Deal
Tue, Dec 31 - Tue, Jan 7
3:45 pm - 12:57 amYUL-SEA
12h 12m1 stop
1:43 pm - 1:35 pmSEA-YUL
20h 52m1 stop
$553American Airlines
Find Deal
Mon, Dec 30 - Wed, Jan 8
4:22 pm - 6:42 pmYYZ-SEA
5h 20mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$563Alaska Airlines
Find Deal
Thu, Jan 2 - Tue, Jan 21
10:30 am - 5:00 pmYYZ-SEA
9h 30m1 stop
3:15 pm - 12:38 pmSEA-YYZ
18h 23m1 stop
$589WestJet
Find Deal
Tue, Dec 31 - Tue, Jan 7
6:10 am - 3:24 pmYYZ-SEA
12h 14m1 stop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$655Alaska Airlines
Find Deal
Thu, Jan 2 - Tue, Jan 21
3:30 pm - 9:30 pmYUL-SEA
9h 00m1 stop
5:45 am - 7:35 pmSEA-YUL
10h 50m1 stop
$921Air Canada
Find Deal
Thu, Jan 2 - Fri, Jan 17
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$229Alaska Airlines
Find Deal
Fri, Jan 17 - Thu, Jan 23
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$234Air Canada
Find Deal
Wed, Jan 22 - Thu, Jan 23
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$235Air Canada
Find Deal
Fri, Feb 14 - Mon, Feb 17
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$236Air Canada
Find Deal
Tue, Feb 4 - Thu, Feb 20
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$241Alaska Airlines
Find Deal
Wed, Jan 29 - Tue, Feb 4
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$242United Airlines
Find Deal
Fri, Feb 14 - Mon, Feb 17
4:30 pm - 6:50 pmYYZ-SEA
5h 20mnonstop
7:00 am - 2:40 pmSEA-YYZ
4h 40mnonstop
$257Alaska Airlines
Find Deal
Tue, Apr 15 - Mon, Apr 21
4:20 pm - 6:43 pmYYZ-SEA
5h 23mnonstop
7:27 am - 3:05 pmSEA-YYZ
4h 38mnonstop
$261Alaska Airlines
Find Deal
Fri, Jan 17 - Mon, Jan 20
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
Fri, Feb 14 - Mon, Feb 17
7:05 pm - 9:30 pmYYZ-SEA
5h 25mnonstop
6:05 am - 1:50 pmSEA-YYZ
4h 45mnonstop
$267United Airlines
Find Deal
Tue, Jan 28 - Thu, Jan 30

Air Canada flights from Region of Ontario to Seattle

Our best Air Canada deals on Region of Ontario to Seattle flight tickets
Air Canada
Jan 22
YYZ8:00 amToronto Pearson Intl
9h 30m
1 stop
SEA2:30 pmSeattle/Tacoma Intl
Jan 23
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
Air Canada
Jan 21
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
Jan 28
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
Air Canada
Feb 5
YYZ8:00 amToronto Pearson Intl
9h 30m
1 stop
SEA2:30 pmSeattle/Tacoma Intl
Feb 19
SEA10:35 amSeattle/Tacoma Intl
8h 47m
1 stop
YYZ10:22 pmToronto Pearson Intl

United Airlines flights from Region of Ontario to Seattle

Our best United Airlines deals on Region of Ontario to Seattle flight tickets
United Airlines
Feb 14
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
Feb 17
SEA6:05 amSeattle/Tacoma Intl
4h 45m
YYZ1:50 pmToronto Pearson Intl
United Airlines
Feb 6
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
Feb 24
SEA11:59 pmSeattle/Tacoma Intl
6h 59m
1 stop
YYZ9:58 amToronto Pearson Intl
United Airlines
Jan 31
YYZ7:05 pmToronto Pearson Intl
5h 25m
SEA9:30 pmSeattle/Tacoma Intl
Feb 2
SEA12:50 pmSeattle/Tacoma Intl
8h 32m
1 stop
YYZ12:22 amToronto Pearson Intl

See travel insights to Seattle from

How to get the cheapest flight ticket from Region of Ontario to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, November is the cheapest month to fly from Region of Ontario to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $343. If you don’t want to visit Seattle in November, then you should wait until October to fly from Region of Ontario, when ticket prices are also cheap, with an average price of $360.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Region of Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $455. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Region of Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $522.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Region of Ontario in the morning is the least expensive time of day to depart. momondo users have found prices as low as $483 when looking at flights departing in the morning. Flights to Seattle are more costly at noon, with an average ticket price of $539. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ontario to Seattle/Tacoma Intl flight route?

Fly from Toronto Pearson Intl to Seattle/Tacoma Intl for the best Ontario - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Region of Ontario when booking 58 days ahead of your departure date. In general, you can expect to find flights to Seattle for around $447 when searching 58 days out. Keep in mind that you might be able to find cheaper flights to Seattle at any time. In fact, our users found flights for as low as $285 in the past 72 hours.

What cabin class options are available on Ontario to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Ontario to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Seattle flights?

You could potentially save up to 4% on your flight if you consider stops on a Region of Ontario to Seattle flight.

Cheap Region of Ontario to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Seattle

Best Price Found

$134

Fastest flight time

5h 20m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Region of Ontario in the past 72 hours is $134. The best round-trip flight deal from Region of Ontario to Seattle found on momondo in the last 72 hours is $229.
The fastest flight from Region of Ontario to Seattle takes 5h 20m
Direct flights go from Region of Ontario to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • When did momondo last update prices for flights from Ontario to Seattle/Tacoma Intl Airport?

    Prices for flights from Ontario to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Ontario to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Ontario to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Region of Ontario to Seattle?


Best airlines flying from Region of Ontario to Seattle

Compare and see reviews for airlines that fly from Region of Ontario to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $139Free CancellationRating
7.0
8,441 reviews
Search Air Canada flights
WestJetPriceFrom $163Free CancellationRating
7.2
2,814 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $246Free CancellationRating
8.0
9,573 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $263Free CancellationRating
7.4
9,002 reviews
Search United Airlines flights
DeltaPriceFrom $292Free CancellationRating
8.0
8,556 reviews
Search Delta flights
American AirlinesPriceFrom $402Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Seattle?

Finding the right flight to Seattle from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Ontario to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to Seattle?

Once you have performed a search for Ontario to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Ontario to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Ontario and alert you when they change.


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