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

48 flights are operational weekly from Seattle to Region of Ontario as of September 2025. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.

What airlines fly to Region of Ontario?

Alaska Airlines, Air Canada and WestJet are the top three most popular airlines that fly to Region of Ontario from Seattle according to our data. Alaska Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Region of Ontario. Keep in mind that there are 5 different airlines that fly to Region of Ontario on a routine basis, so you have a few additional options to choose from.

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

The number of flights available between Seattle and Region of Ontario is 6 per day as of September 2025. The most frequent departure time is 7:00AM, with 58% of daily flights leaving at noon.

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

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

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?

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

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.

$92 Cheap Flights from Seattle to Ontario in 2025/26

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Find the cheapest flights from Seattle to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

2:05 pm - 12:40 amSEA-YHM

7h 35m1 stop

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$229WestJet

Find Deal

mar., oct. 14 - mar., oct. 21

2:05 pm - 12:40 amSEA-YOW

7h 35m1 stop

6:00 am - 12:59 pmYOW-SEA

9h 59m1 stop

$234WestJet

Find Deal

lun., oct. 20 - mié., oct. 22

8:40 am - 12:40 amSEA-YHM

13h 00m1 stop

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$235WestJet

Find Deal

dom., oct. 12 - mié., oct. 15

11:50 pm - 10:07 amSEA-YOW

7h 17m1 stop

2:05 pm - 12:51 amYOW-SEA

13h 46m2 stops

$249United Airlines

Find Deal

mar., mar. 10 - mié., mar. 11

6:31 am - 4:50 pmSEA-YOW

7h 19m1 stop

4:10 pm - 10:16 pmYOW-SEA

9h 06m1 stop

$252United Airlines

Find Deal

mar., mar. 10 - mié., mar. 11

2:05 pm - 11:48 pmSEA-YHM

30h 43m2 stops

6:00 am - 12:59 pmYHM-SEA

9h 59m1 stop

$253Multiple Airlines

Find Deal

mar., oct. 14 - mar., oct. 21

8:15 am - 3:58 pmSEA-YYZ

4h 43mnonstop

7:50 pm - 10:16 pmYYZ-SEA

5h 26mnonstop

$258Air Canada

Find Deal

sáb., nov. 1 - dom., nov. 16

2:55 pm - 7:00 amSEA-YYZ

13h 05m2 stops

10:25 am - 6:36 pmYYZ-SEA

11h 11m2 stops

$260Air Canada

Find Deal

lun., oct. 6 - mar., oct. 7

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

7:45 am - 2:20 pmYYZ-SEA

9h 35m1 stop

$263Multiple Airlines

Find Deal

vie., oct. 31 - lun., nov. 3

7:55 am - 3:35 pmSEA-YYZ

4h 40mnonstop

4:45 pm - 7:05 pmYYZ-SEA

5h 20mnonstop

$273Alaska Airlines

Find Deal

dom., nov. 9 - jue., nov. 13

WestJet flights from Seattle to Region of Ontario

Our best WestJet deals on Seattle to Region of Ontario flight tickets

WestJet

Oct 14

SEA2:05 pmSeattle/Tacoma Intl

7h 35m

1 stop

YHM12:40 amHamilton

Oct 21

YHM6:00 amHamilton

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$229

Find similar

WestJet

Oct 20

SEA2:05 pmSeattle/Tacoma Intl

7h 35m

1 stop

YOW12:40 amOttawa

Oct 22

YOW6:00 amOttawa

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$234

Find similar

WestJet

Oct 12

SEA8:40 amSeattle/Tacoma Intl

13h 00m

1 stop

YHM12:40 amHamilton

Oct 15

YHM6:00 amHamilton

9h 59m

1 stop

SEA12:59 pmSeattle/Tacoma Intl

$235

Find similar

United Airlines flights from Seattle to Region of Ontario

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

United Airlines

Mar 10

SEA11:50 pmSeattle/Tacoma Intl

7h 17m

1 stop

YOW10:07 amOttawa

Mar 11

YOW2:05 pmOttawa

13h 46m

2 stops

SEA12:51 amSeattle/Tacoma Intl

$249

Find similar

United Airlines

Mar 10

SEA6:31 amSeattle/Tacoma Intl

7h 19m

1 stop

YOW4:50 pmOttawa

Mar 11

YOW4:10 pmOttawa

9h 06m

1 stop

SEA10:16 pmSeattle/Tacoma Intl

$252

Find similar

United Airlines

Mar 10

SEA1:55 pmSeattle/Tacoma Intl

17h 12m

2 stops

YOW10:07 amOttawa

Mar 11

YOW2:05 pmOttawa

13h 46m

2 stops

SEA12:51 amSeattle/Tacoma Intl

$254

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

mar. 10/14

2:05 pm-12:40 am

1 stop7h 35m

Hamilton

mar. 10/21

6:00 am-12:59 pm

1 stop9h 59m

$229

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

lun. 10/20

2:05 pm-12:40 am

1 stop7h 35m

Ottawa

mié. 10/22

6:00 am-12:59 pm

1 stop9h 59m

$234

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

dom. 10/12

8:40 am-12:40 am

1 stop13h 00m

Hamilton

mié. 10/15

6:00 am-12:59 pm

1 stop9h 59m

$235

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 3/10

11:50 pm-10:07 am

1 stop7h 17m

Ottawa

mié. 3/11

2:05 pm-12:51 am

2 stops13h 46m

$249

SeattleOttawa

SEA - YOW

SEAYOW

Seattle/Tacoma Intl

mar. 3/10

6:31 am-4:50 pm

1 stop7h 19m

Ottawa

mié. 3/11

4:10 pm-10:16 pm

1 stop9h 06m

$252

SeattleHamilton

SEA - YHM

SEAYHM

Seattle/Tacoma Intl

mar. 10/14

2:05 pm-11:48 pm

2 stops30h 43m

Hamilton

mar. 10/21

6:00 am-12:59 pm

1 stop9h 59m

$253

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

sáb. 11/1

8:15 am-3:58 pm

Nonstop4h 43m

Toronto Pearson Intl

dom. 11/16

7:50 pm-10:16 pm

Nonstop5h 26m

$258

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

lun. 10/6

2:55 pm-7:00 am

2 stops13h 05m

Toronto Pearson Intl

mar. 10/7

10:25 am-6:36 pm

2 stops11h 11m

$260

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

vie. 10/31

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

lun. 11/3

7:45 am-2:20 pm

1 stop9h 35m

$263

SeattleToronto

SEA - YYZ

SEAYYZ

Seattle/Tacoma Intl

dom. 11/9

7:55 am-3:35 pm

Nonstop4h 40m

Toronto Pearson Intl

jue. 11/13

4:45 pm-7:05 pm

Nonstop5h 20m

$273

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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

Prices

Airlines

Other information

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, Tuesday is the cheapest day to fly to Region of Ontario from Seattle. The lowest ticket price found for a Tuesday departure recently was $549. 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 Saturday will generally be more expensive and average around $703. 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 evening are often more expensive with an average ticket price of $627.

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 weeks ahead of your departure date. In general, you can expect to find flights to Region of Ontario for around $423 when searching 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.

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

You could potentially save up to 27% on your flight if you consider stops on a Seattle to Region of Ontario flight.

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	$139
Fastest flight time	4h 35m
Direct flights	Every day
Airports in Region of Ontario	1 airport

The best one-way flight to Region of Ontario from Seattle in the past 72 hours is $139. The best round-trip flight deal from Seattle to Region of Ontario found on momondo in the last 72 hours is $374.

The fastest flight from Seattle to Region of Ontario takes 4h 35m

Direct flights go from Seattle to Region of Ontario every day.

There is 1 airport near Region of Ontario: Toronto Pearson Intl (YYZ)

Search flight deals

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?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Ontario is 6 as of September 2025.
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?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Region of Ontario is Boeing 737 MAX 8, representing 25.57% of all bookings. The subsequent popular models are Airbus A320-100/200 at 20.28%, Airbus A220-300 at 18.87%, and Boeing 737-900 Passenger/BBJ3 (winglets) at 8.64%.

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 Canada	PriceFrom $128	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
United Airlines	PriceFrom $173	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Delta	PriceFrom $186	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
WestJet	PriceFrom $235	Free Cancellation	Rating 7.2 3,095 reviews	Search WestJet flights
Alaska Airlines	PriceFrom $276	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines 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.

An easier way to manage your Region of Ontario trip

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vie. 10/17

vie. 10/24

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Find better results for your trip to Ontario

Popular cities in Ontario

Flights to Torontofrom $98

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Flights to Calgaryfrom $132

Flights to Ottawafrom $190

Flights to Halifaxfrom $188

Flights to Winnipegfrom $157

Flights to Québec Cityfrom $177

Flights to Saskatoonfrom $117

Flights to Kelownafrom $156

Flights to St. John'sfrom $244

Flights to Reginafrom $206

Cheap flights from Seattle to Ontario from $92

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 10/24. 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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Big names and deals

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Filter for what you want

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Find the cheapest flights from Seattle to Ontario

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WestJet flights from Seattle to Region of Ontario

Our best WestJet deals on Seattle to Region of Ontario flight tickets

United Airlines flights from Seattle to Region of Ontario

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

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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?

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

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

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?

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.

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

You could potentially save up to 27% on your flight if you consider stops on a Seattle to Region of Ontario flight.

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

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

What airlines fly to Region of Ontario?

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

The number of flights available between Seattle and Region of Ontario is 6 per day as of September 2025. The most frequent departure time is 7:00AM, with 58% of daily flights leaving at noon.

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

48 flights are operational weekly from Seattle to Region of Ontario as of September 2025. The most popular departure day for this route is Wed, with 17% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Region of Ontario

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

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?

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

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

Why use momondo?

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

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

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

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

An easier way to manage your Region of Ontario 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 Ontario

Popular cities in Ontario

Popular flights according to clicks in the last 7 days on momondo