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Cheap flights from Seattle to Ontario from $61

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Ontario departing on 6/4. 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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0 bags

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Find the cheapest flights from Seattle to Ontario

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Ontario.
WestJet Logo
1:50 pm - 12:46 amSEA-YKF
7h 56m1 stop
WestJet Logo
6:00 am - 12:58 pmYKF-SEA
9h 58m1 stop
$155WestJet
Find Deal
Wed, Jul 16 - Sun, Jul 20
Air Canada Logo
7:20 am - 10:49 pmSEA-YQT
12h 29m2 stops
Air Canada Logo
11:05 am - 8:37 pmYQT-SEA
12h 32m2 stops
$162Air Canada
Find Deal
Sat, Jun 7 - Sat, Jun 14
Air Canada Logo
11:40 am - 10:49 pmSEA-YQT
8h 09m1 stop
Air Canada Logo
11:05 am - 8:37 pmYQT-SEA
12h 32m2 stops
$164Air Canada
Find Deal
Sat, Jun 7 - Sat, Jun 14
WestJet Logo
7:05 am - 6:56 pmSEA-YKF
8h 51m1 stop
WestJet Logo
6:00 am - 12:58 pmYKF-SEA
9h 58m1 stop
$166WestJet
Find Deal
Thu, Jul 24 - Sun, Jul 27
United Airlines Logo
11:40 am - 10:49 pmSEA-YQT
8h 09m1 stop
United Airlines Logo
5:15 am - 10:51 amYQT-SEA
8h 36m1 stop
$201United Airlines
Find Deal
Fri, Jun 6 - Fri, Jun 13
United Airlines Logo
11:50 pm - 10:49 pmSEA-YQT
19h 59m2 stops
United Airlines Logo
5:15 am - 10:51 amYQT-SEA
8h 36m1 stop
$211United Airlines
Find Deal
Thu, Jun 5 - Thu, Jun 12
Delta Logo
7:35 pm - 5:14 amSEA-YXU
6h 39m1 stop
Delta Logo
6:00 am - 12:58 pmYXU-SEA
9h 58m1 stop
$316Delta
Find Deal
Fri, Jul 25 - Wed, Jul 30
Alaska Airlines Logo
7:23 am - 3:00 pmSEA-YYZ
4h 37mnonstop
Alaska Airlines Logo
4:45 pm - 7:04 pmYYZ-SEA
5h 19mnonstop
$318Alaska Airlines
Find Deal
Tue, Jun 3 - Thu, Jun 5
Alaska Airlines Logo
7:23 am - 3:00 pmSEA-YYZ
4h 37mnonstop
Alaska Airlines Logo
4:45 pm - 7:04 pmYYZ-SEA
5h 19mnonstop
$329Alaska Airlines
Find Deal
Mon, Jun 2 - Fri, Jun 6
Delta Logo
9:20 pm - 12:14 pmSEA-YYZ
11h 54m1 stop
Delta Logo
6:05 pm - 10:23 pmYYZ-SEA
7h 18m1 stop
$332Delta
Find Deal
Sun, Jun 1 - Thu, Jun 5

Alaska Airlines flights from Seattle to Region of Ontario

Our best Alaska Airlines deals on Seattle to Region of Ontario flight tickets
Alaska Airlines
Jun 3
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl
Jun 5
YYZ4:45 pmToronto Pearson Intl
5h 19m
SEA7:04 pmSeattle/Tacoma Intl
Alaska Airlines
Jun 2
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl
Jun 6
YYZ4:45 pmToronto Pearson Intl
5h 19m
SEA7:04 pmSeattle/Tacoma Intl
Alaska Airlines
May 17
SEA7:23 amSeattle/Tacoma Intl
4h 37m
YYZ3:00 pmToronto Pearson Intl
May 25
YYZ8:25 amToronto Pearson Intl
5h 20m
SEA10:45 amSeattle/Tacoma Intl

Air Canada flights from Seattle to Region of Ontario

Our best Air Canada deals on Seattle to Region of Ontario flight tickets
Air Canada
Jun 7
SEA7:20 amSeattle/Tacoma Intl
12h 29m
2 stops
YQT10:49 pmThunder Bay
Jun 14
YQT11:05 amThunder Bay
12h 32m
2 stops
SEA8:37 pmSeattle/Tacoma Intl
Air Canada
Jun 7
SEA11:40 amSeattle/Tacoma Intl
8h 09m
1 stop
YQT10:49 pmThunder Bay
Jun 14
YQT11:05 amThunder Bay
12h 32m
2 stops
SEA8:37 pmSeattle/Tacoma Intl
Air Canada
Jun 7
SEA11:40 amSeattle/Tacoma Intl
8h 09m
1 stop
YQT10:49 pmThunder Bay
Jun 14
YQT5:15 amThunder Bay
8h 36m
1 stop
SEA10:51 amSeattle/Tacoma Intl

See travel insights to Ontario from

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

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 Region of Ontario?

The month of January is, on average, the cheapest month to fly to Region of Ontario from Seattle, with most prices found around $282. If you aren’t able to travel during the month of January, then book flights to Region of Ontario from Seattle during February instead. Flights to Region of Ontario in February, while not as cheap as those in January, still average around $286.

What is the cheapest day to depart on your flight to Region of Ontario?

According to our data, Thursday is the cheapest day to fly to Region of Ontario from Seattle. The lowest ticket price found for a Thursday departure recently was $617. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Seattle to Region of Ontario on a Sunday will generally be more expensive and average around $745. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Region of Ontario is in the afternoon. momondo users have found flights departing from Seattle to Region of Ontario in the afternoon for as low as $283. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $668.

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

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

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

You are more likely to see cheaper flights to Region of Ontario from Seattle when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $433 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Region of Ontario from Seattle for as low as $292 on momondo.

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

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

Cheap Seattle to Region of Ontario flight deals and tips

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

Best Price Found

$61

Fastest flight time

4h 36m

Direct flights

Every day

Airports in Region of Ontario

6 airports
The best one-way flight to Region of Ontario from Seattle in the past 72 hours is $61. The best round-trip flight deal from Seattle to Region of Ontario found on momondo in the last 72 hours is $155.
The fastest flight from Seattle to Region of Ontario takes 4h 36m
Direct flights go from Seattle to Region of Ontario every day.
There are 6 airports near Region of Ontario: Montreal Pierre Elliott Trudeau Intl (YUL), Toronto Region of Waterloo Intl (YKF), London (YXU), Toronto Pearson Intl (YYZ), Thunder Bay (YQT), Hamilton (YHM)

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

    Prices for flights from Seattle/Tacoma Intl Airport to Ontario are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Ontario.

  • What documentation or ID do you need to fly to Ontario?

    The travel and health documents you'll need for your trip to Ontario may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from Seattle to Region of Ontario

Compare and see reviews for airlines that fly from Seattle to Region of Ontario with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $136Free CancellationRating
7.0
9,189 reviews
Search Air Canada flights
United AirlinesPriceFrom $158Free CancellationRating
7.4
8,685 reviews
Search United Airlines flights
WestJetPriceFrom $235Free CancellationRating
7.2
2,815 reviews
Search WestJet flights
Alaska AirlinesPriceFrom $251Free CancellationRating
8.0
9,918 reviews
Search Alaska Airlines flights
DeltaPriceFrom $394Free CancellationRating
8.0
7,920 reviews
Search Delta flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Ontario. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Ontario from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Seattle.

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

Of course. momondo tracks the price of Seattle to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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