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

As of November 2025, 5 flights take off from Region of Ontario and land in Seattle each day. The most common flight departure time for this route is 7:00PM, with 50% of daily flights taking off in the afternoon.

What is the cheapest airline that flies from Ontario to Seattle/Tacoma Intl?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from Ontario to Seattle/Tacoma Intl

How long does it take to fly to Seattle?

Flight times vary depending on what airport in Region of Ontario you fly out of and what airport in Seattle you fly into. For example, flying from Toronto to Seattle takes 8h 14m on average. On the other hand, flying from Hamilton to Seattle takes 9h 24m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.

What airlines fly to Seattle?

Air Canada, Alaska Airlines and WestJet are the top three most popular airlines that fly to Seattle from Region of Ontario according to our data. Air Canada is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between Region of Ontario and Seattle is 37 per week as of November 2025. The most frequent departure day is Mon, with 19% of weekly flights leaving on this day.

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?

The number of operators available for flights from Ontario to Seattle/Tacoma Intl Airport is 6 as of November 2025.

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.

$154 Cheap Flights from Ontario to Seattle in 2025/26

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3:45 pm - 8:28 pmYOW-SEA

7h 43m1 stop

7:05 am - 6:25 pmSEA-YOW

8h 20m1 stop

$196WestJet

Find Deal

sex, mai 15 - sáb, mai 23

3:45 pm - 8:28 pmYOW-SEA

7h 43m1 stop

7:05 am - 6:25 pmSEA-YOW

8h 20m1 stop

$197WestJet

Find Deal

sex, mai 15 - sáb, mai 23

12:00 pm - 8:28 pmYYZ-SEA

11h 28m2 stops

7:05 am - 9:00 pmSEA-YYZ

10h 55m2 stops

$212WestJet

Find Deal

qui, mai 7 - seg, mai 11

8:00 am - 2:38 pmYYZ-SEA

9h 38m2 stops

3:10 pm - 5:23 pmSEA-YYZ

23h 13m2 stops

$216WestJet

Find Deal

sáb, jan 10 - ter, fev 10

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

8:10 am - 3:53 pmSEA-YYZ

4h 43mnonstop

$221Air Canada

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sex, jan 9 - sáb, jan 17

8:00 am - 2:38 pmYYZ-SEA

9h 38m2 stops

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

$226Multiple Airlines

Find Deal

sáb, jan 10 - sáb, jan 17

5:10 am - 2:31 pmYXU-SEA

12h 21m2 stops

8:00 pm - 8:46 amSEA-YXU

9h 46m2 stops

$247Air Canada

Find Deal

ter, jan 20 - qua, jan 21

2:13 pm - 8:54 pmYUL-SEA

9h 41m1 stop

8:10 am - 7:48 pmSEA-YUL

8h 38m1 stop

$294United Airlines

Find Deal

sáb, dez 6 - ter, dez 9

6:00 am - 11:15 pmYUL-SEA

20h 15m2 stops

3:25 pm - 2:00 pmSEA-YUL

19h 35m2 stops

$297United Airlines

Find Deal

sex, dez 12 - seg, dez 15

3:00 pm - 8:51 pmYTZ-SEA

8h 51m1 stop

3:10 pm - 7:50 pmSEA-YTZ

25h 40m2 stops

$417Multiple Airlines

Find Deal

ter, dez 9 - qui, dez 11

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 9

YYZ7:50 pmToronto Pearson Intl

5h 26m

SEA10:16 pmSeattle/Tacoma Intl

Jan 17

SEA8:10 amSeattle/Tacoma Intl

4h 43m

YYZ3:53 pmToronto Pearson Intl

$221

Find similar

Air Canada

Jan 9

YYZ8:00 amToronto Pearson Intl

9h 31m

1 stop

SEA2:31 pmSeattle/Tacoma Intl

Jan 17

SEA8:00 pmSeattle/Tacoma Intl

7h 19m

1 stop

YYZ6:19 amToronto Pearson Intl

$231

Find similar

Air Canada

Jan 9

YYZ12:00 pmToronto Pearson Intl

13h 06m

2 stops

SEA10:06 pmSeattle/Tacoma Intl

Jan 17

SEA8:00 pmSeattle/Tacoma Intl

7h 19m

1 stop

YYZ6:19 amToronto Pearson Intl

$236

Find similar

American Airlines flights from Region of Ontario to Seattle

Our best American Airlines deals on Region of Ontario to Seattle flight tickets

American Airlines

Dec 11

YUL2:29 pmMontreal Pierre Elliott Trudeau Intl

9h 27m

1 stop

SEA8:56 pmSeattle/Tacoma Intl

Dec 14

SEA12:38 amSeattle/Tacoma Intl

11h 32m

1 stop

YUL3:10 pmMontreal Pierre Elliott Trudeau Intl

$395

Find similar

American Airlines

Dec 16

YUL7:30 amMontreal Pierre Elliott Trudeau Intl

17h 20m

1 stop

SEA9:50 pmSeattle/Tacoma Intl

Jan 1

SEA12:14 amSeattle/Tacoma Intl

11h 56m

1 stop

YUL3:10 pmMontreal Pierre Elliott Trudeau Intl

$396

Find similar

American Airlines

Dec 12

YUL3:50 pmMontreal Pierre Elliott Trudeau Intl

10h 35m

1 stop

SEA11:25 pmSeattle/Tacoma Intl

Dec 15

SEA12:31 amSeattle/Tacoma Intl

11h 53m

2 stops

YUL3:24 pmMontreal Pierre Elliott Trudeau Intl

$405

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Fly from

Fly to

Route

Depart

Return

Price

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

sex 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

sáb 5/23

7:05 am-6:25 pm

1 stop8h 20m

$196

OttawaSeattle

YOW - SEA

YOWSEA

Ottawa

sex 5/15

3:45 pm-8:28 pm

1 stop7h 43m

Seattle/Tacoma Intl

sáb 5/23

7:05 am-6:25 pm

1 stop8h 20m

$197

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

qui 5/7

12:00 pm-8:28 pm

2 stops11h 28m

Seattle/Tacoma Intl

seg 5/11

7:05 am-9:00 pm

2 stops10h 55m

$212

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

sáb 1/10

8:00 am-2:38 pm

2 stops9h 38m

Seattle/Tacoma Intl

ter 2/10

3:10 pm-5:23 pm

2 stops23h 13m

$216

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

sex 1/9

7:50 pm-10:16 pm

Nonstop5h 26m

Seattle/Tacoma Intl

sáb 1/17

8:10 am-3:53 pm

Nonstop4h 43m

$221

TorontoSeattle

YYZ - SEA

YYZSEA

Toronto Pearson Intl

sáb 1/10

8:00 am-2:38 pm

2 stops9h 38m

Seattle/Tacoma Intl

sáb 1/17

7:55 am-3:35 pm

Nonstop4h 40m

$226

LondonSeattle

YXU - SEA

YXUSEA

London

ter 1/20

5:10 am-2:31 pm

2 stops12h 21m

Seattle/Tacoma Intl

qua 1/21

8:00 pm-8:46 am

2 stops9h 46m

$247

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

sáb 12/6

2:13 pm-8:54 pm

1 stop9h 41m

Seattle/Tacoma Intl

ter 12/9

8:10 am-7:48 pm

1 stop8h 38m

$294

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

sex 12/12

6:00 am-11:15 pm

2 stops20h 15m

Seattle/Tacoma Intl

seg 12/15

3:25 pm-2:00 pm

2 stops19h 35m

$297

TorontoSeattle

YTZ - SEA

YTZSEA

Toronto Island

ter 12/9

3:00 pm-8:51 pm

1 stop8h 51m

Seattle/Tacoma Intl

qui 12/11

3:10 pm-7:50 pm

2 stops25h 40m

$417

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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

Prices

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Other information

What is the cheapest month to fly to Seattle?

In general, February 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 $263. If you don’t want to visit Seattle in February, then you should wait until January to fly from Region of Ontario, when ticket prices are also cheap, with an average price of $266.

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 Friday. momondo users have found tickets for Friday departures for as low as $440. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday 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 $649.

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

Flying to Seattle from Region of Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $266 when looking at flights departing in the evening. 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 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $358 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Region of Ontario for as low as $298 on momondo.

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 35% 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	$184
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 $184. The best round-trip flight deal from Region of Ontario to Seattle found on momondo in the last 72 hours is $325.

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)

Search flight deals

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?
The number of operators available for flights from Ontario to Seattle/Tacoma Intl Airport is 6 as of November 2025.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Region of Ontario to Seattle is Airbus A220-300 (44.21% of total bookings). The next most popular plane models are Airbus A320-100/200 (16.32%), Boeing 737 MAX 8 (12.04%), and Embraer 195 E2 (4.51%).

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
WestJet	PriceFrom $192	Free Cancellation	Rating 7.2 3,163 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $225	Free Cancellation	Rating 8.0 11,312 reviews	Search Alaska Airlines flights
Air Canada	PriceFrom $238	Free Cancellation	Rating 7.1 10,457 reviews	Search Air Canada flights
United Airlines	PriceFrom $243	Free Cancellation	Rating 7.4 9,014 reviews	Search United Airlines flights
American Airlines	PriceFrom $277	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Delta	PriceFrom $289	Free Cancellation	Rating 7.9 8,006 reviews	Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Redmond

Tukwila

Lakewood

Federal Way

Fife

Cle Elum

Centralia

Kirkland

Westport

Shoreline

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.

An easier way to manage your Seattle trip

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Cheap flights from Ontario to Seattle from $154

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 1/21. 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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Air Canada flights from Region of Ontario to Seattle

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American Airlines flights from Region of Ontario to Seattle

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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?

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

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

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?

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 35% on your flight if you consider stops on a Region of Ontario to Seattle flight.

What is the cheapest airline that flies from Ontario to Seattle/Tacoma Intl?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from Ontario to Seattle/Tacoma Intl

What airlines fly to Seattle?

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

As of November 2025, 5 flights take off from Region of Ontario and land in Seattle each day. The most common flight departure time for this route is 7:00PM, with 50% of daily flights taking off in the afternoon.

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

The number of flights available between Region of Ontario and Seattle is 37 per week as of November 2025. The most frequent departure day is Mon, with 19% of weekly flights leaving on this day.

How long does it take to fly to Seattle?

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

Fastest flight time

Direct flights

Airports in Seattle

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

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?

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

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

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington