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

As of September 2026, there are 2 flights per day flying from Seattle to Region of Ontario. The most common time of day flights depart is 8:00a.m., with 100% of flights taking off at noon.

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

Delta, WestJet, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Ontario

Which airlines fly to Region of Ontario?

Alaska Airlines, WestJet and Air Canada 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 48% of people opting to fly with this airline when travelling to Region of Ontario. Keep in mind that there are 3 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 week?

The number of flights available between Seattle and Region of Ontario is 19 per week as of September 2026. The most frequent departure day is Wed, with 26% of weekly flights leaving on this day.

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 updated daily.

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 3 as of September 2026.

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

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 Seattle/Tacoma Intl Airport to Ontario.

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

The travel and health documents required for your trip to Ontario 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 Ontario. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 166 Cheap Flights from Seattle to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Ontario

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

C$ 372WestJet

Mon, 19 Oct - Thu, 22 Oct

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

C$ 388WestJet

Sat, 10 Oct - Mon, 19 Oct

7:35 p.m. - 5:35 a.m.SEA Seattle/Tacoma Intl-YOW Ottawa

7h 00m1 stop Calgary

1:20 p.m. - 6:45 p.m.YOW Ottawa-SEA Seattle/Tacoma Intl

8h 25m1 stop Calgary

C$ 399WestJet

Sat, 10 Oct - Mon, 19 Oct

10:30 a.m. - 10:30 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

9h 00m1 stop Calgary

1:30 p.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

8h 15m1 stop Calgary

C$ 487Multiple Airlines

Wed, 21 Oct - Sat, 24 Oct

10:30 a.m. - 9:15 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

7h 45m1 stop Calgary

3:50 p.m. - 9:48 a.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

20h 58m2 stops Calgary Las Vegas Harry Reid Intl

C$ 491Multiple Airlines

Fri, 16 Oct - Thu, 22 Oct

10:30 a.m. - 10:30 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

9h 00m1 stop Calgary

1:30 p.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

8h 15m1 stop Calgary

C$ 492Multiple Airlines

Sat, 17 Oct - Sat, 24 Oct

8:19 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 46mdirect

5:15 p.m. - 7:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 30mdirect

C$ 656Alaska Airlines

Wed, 11 Nov - Sat, 14 Nov

8:00 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

C$ 656Alaska Airlines

Tue, 20 Oct - Sat, 24 Oct

7:45 a.m. - 3:25 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 40mdirect

6:25 p.m. - 8:59 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 34mdirect

C$ 657Air Canada

Fri, 30 Oct - Fri, 6 Nov

7:55 a.m. - 3:36 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 662Air Canada

Sat, 17 Oct - Sat, 24 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

7:35 p.m. - 5:45 a.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

7h 10m1 stop Calgary

7:00 a.m. - 6:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

14h 45m1 stop Calgary

C$ 487WestJet

Wed, 23 Sep - Sat, 26 Sep

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

8:00 p.m. - 9:40 a.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

16h 40m1 stop Calgary

C$ 490WestJet

Tue, 22 Sep - Mon, 28 Sep

7:35 p.m. - 7:05 a.m.SEA Seattle/Tacoma Intl-YUL Montreal Pierre Elliott Trudeau Intl

8h 30m1 stop Calgary

6:45 a.m. - 6:45 p.m.YUL Montreal Pierre Elliott Trudeau Intl-SEA Seattle/Tacoma Intl

15h 00m2 stops Toronto Pearson Intl Calgary

C$ 495WestJet

Tue, 22 Sep - Mon, 28 Sep

7:35 p.m. - 5:45 a.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

7h 10m1 stop Calgary

4:55 p.m. - 7:13 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 18mdirect

C$ 670Multiple Airlines

Wed, 23 Sep - Sat, 26 Sep

7:35 p.m. - 5:45 a.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

7h 10m1 stop Calgary

4:55 p.m. - 7:13 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 18mdirect

C$ 670Multiple Airlines

Wed, 23 Sep - Thu, 24 Sep

7:35 p.m. - 5:45 a.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

7h 10m1 stop Calgary

3:50 p.m. - 9:42 a.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

20h 52m2 stops Calgary Las Vegas Harry Reid Intl

C$ 674Multiple Airlines

Wed, 23 Sep - Thu, 24 Sep

7:52 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 53mdirect

4:55 p.m. - 7:13 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 18mdirect

C$ 902Alaska Airlines

Tue, 22 Sep - Tue, 29 Sep

7:52 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 53mdirect

4:55 p.m. - 7:13 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 18mdirect

C$ 918Alaska Airlines

Wed, 23 Sep - Wed, 30 Sep

8:00 a.m. - 3:41 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 918Air Canada

Tue, 22 Sep - Tue, 29 Sep

8:00 a.m. - 3:41 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

6:45 p.m. - 9:04 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 918Air Canada

Tue, 22 Sep - Thu, 1 Oct

Cheap direct flights

Enter your travel dates to find the best prices.

8:00 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

C$ 656Alaska Airlines

Wed, 21 Oct - Sat, 24 Oct

8:20 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

5:15 p.m. - 7:45 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 30mdirect

C$ 656Alaska Airlines

Sat, 31 Oct - Sat, 14 Nov

8:00 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

4:55 p.m. - 7:26 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 31mdirect

C$ 656Alaska Airlines

Wed, 14 Oct - Thu, 22 Oct

8:21 a.m. - 4:05 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 44mdirect

5:15 p.m. - 7:43 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 28mdirect

C$ 656Alaska Airlines

Tue, 1 Dec - Tue, 8 Dec

7:45 a.m. - 3:25 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 40mdirect

6:25 p.m. - 8:59 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 34mdirect

C$ 657Air Canada

Fri, 30 Oct - Fri, 6 Nov

7:55 a.m. - 3:36 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 662Air Canada

Sat, 17 Oct - Sat, 24 Oct

7:55 a.m. - 3:36 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 663Air Canada

Sat, 17 Oct - Sat, 24 Oct

8:00 a.m. - 3:45 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 45mdirect

7:20 p.m. - 9:39 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 704Multiple Airlines

Sat, 17 Oct - Sat, 24 Oct

7:55 a.m. - 3:36 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 41mdirect

7:15 p.m. - 9:34 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 19mdirect

C$ 962United Airlines

Tue, 13 Oct - Sat, 17 Oct

7:45 a.m. - 3:25 p.m.SEA Seattle/Tacoma Intl-YYZ Toronto Pearson Intl

4h 40mdirect

6:25 p.m. - 8:59 p.m.YYZ Toronto Pearson Intl-SEA Seattle/Tacoma Intl

5h 34mdirect

C$ 1,017United Airlines

Fri, 15 Jan - Tue, 19 Jan

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WestJet flights from Seattle to Region of Ontario

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

WestJet

19 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 a.m.Ottawa

22 Oct

YOW1:20 p.m.Ottawa

8h 25m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 372

WestJet

10 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 a.m.Ottawa

19 Oct

YOW1:20 p.m.Ottawa

8h 25m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 388

WestJet

10 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

7h 00m

1 stop

YOW5:35 a.m.Ottawa

19 Oct

YOW1:20 p.m.Ottawa

8h 25m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

C$ 399

United Airlines flights from Seattle to Region of Ontario

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

United Airlines

29 Oct

SEA8:09 a.m.Seattle/Tacoma Intl

8h 18m

1 stop

YOW7:27 p.m.Ottawa

5 Nov

YOW4:46 p.m.Ottawa

9h 21m

1 stop

SEA11:07 p.m.Seattle/Tacoma Intl

C$ 695

United Airlines

30 Sep

SEA8:29 p.m.Seattle/Tacoma Intl

8h 47m

1 stop

YUL8:16 a.m.Montreal Pierre Elliott Trudeau Intl

4 Oct

YUL6:35 p.m.Montreal Pierre Elliott Trudeau Intl

9h 40m

1 stop

SEA1:15 a.m.Seattle/Tacoma Intl

C$ 708

United Airlines

29 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

21h 17m

2 stops

YXU7:52 p.m.London

5 Nov

YXU3:25 p.m.London

27h 47m

2 stops

SEA4:12 p.m.Seattle/Tacoma Intl

C$ 1,044

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Mon 19/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Thu 22/10

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 372

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sat 10/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Mon 19/10

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 388

SeattleOttawa

SEA Seattle/Tacoma Intl - YOW Ottawa

SEAYOW

Seattle/Tacoma Intl

Sat 10/10

7:35 p.m.-5:35 a.m.

1 stop7h 00m

Ottawa

Mon 19/10

1:20 p.m.-6:45 p.m.

1 stop8h 25m

C$ 399

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Wed 21/10

10:30 a.m.-10:30 p.m.

1 stop9h 00m

Toronto Pearson Intl

Sat 24/10

1:30 p.m.-6:45 p.m.

1 stop8h 15m

C$ 487

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Fri 16/10

10:30 a.m.-9:15 p.m.

1 stop7h 45m

Toronto Pearson Intl

Thu 22/10

3:50 p.m.-9:48 a.m.

2 stops20h 58m

C$ 491

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sat 17/10

10:30 a.m.-10:30 p.m.

1 stop9h 00m

Toronto Pearson Intl

Sat 24/10

1:30 p.m.-6:45 p.m.

1 stop8h 15m

C$ 492

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Wed 11/11

8:19 a.m.-4:05 p.m.

Nonstop4h 46m

Toronto Pearson Intl

Sat 14/11

5:15 p.m.-7:45 p.m.

Nonstop5h 30m

C$ 656

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Tue 20/10

8:00 a.m.-3:45 p.m.

Nonstop4h 45m

Toronto Pearson Intl

Sat 24/10

4:55 p.m.-7:26 p.m.

Nonstop5h 31m

C$ 656

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Fri 30/10

7:45 a.m.-3:25 p.m.

Nonstop4h 40m

Toronto Pearson Intl

Fri 6/11

6:25 p.m.-8:59 p.m.

Nonstop5h 34m

C$ 657

Quickest round-trip

SeattleToronto

SEA Seattle/Tacoma Intl - YYZ Toronto Pearson Intl

SEAYYZ

Seattle/Tacoma Intl

Sat 17/10

7:55 a.m.-3:36 p.m.

Nonstop4h 41m

Toronto Pearson Intl

Sat 24/10

7:20 p.m.-9:39 p.m.

Nonstop5h 19m

C$ 662

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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?

In general, January is the cheapest month to fly from Seattle to Region of Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 383. If you are unable to visit Region of Ontario during the month of January, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around C$ 434.

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

The cheapest day to depart from Seattle to Region of Ontario is on a Thursday. Travellers who choose to depart for Region of Ontario on a Thursday will often find tickets for as low as C$ 755. The most expensive day to fly to Region of Ontario is Monday, with ticket prices averaging around C$ 1,097.

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 from Seattle to 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 C$ 568 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 C$ 445 on momondo.

What cabin class options are available on Seattle to Region of Ontario flights?

There are 3 cabin classes available to choose from on Seattle to Region of 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?

No. A direct flight is the cheapest option for a flight between Seattle to Region of Ontario.

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	C$ 166
Fastest flight time	4h 32m
Direct flights	Every day
Airports in Region of Ontario	125 airports

The best one-way flight to Region of Ontario from Seattle in the past 72 hours is C$ 166. The best round-trip flight deal from Seattle to Region of Ontario found on momondo in the last 72 hours is C$ 372.

The fastest flight from Seattle to Region of Ontario takes 4h 32m

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

There are 125 airports in Region of Ontario. From Seattle there are direct flights to Toronto Pearson Intl (YYZ).

Search flight deals

Frequently asked questions about flying from Seattle 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 updated daily.
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 3 as of September 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Ontario?
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 Seattle/Tacoma Intl Airport to Ontario.
What documentation or ID do you need to fly to Ontario?
The travel and health documents required for your trip to Ontario 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 Ontario. 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 Seattle to Region of Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to Region of Ontario is Boeing 737-900 Passenger/BBJ3 (winglets) (14.29% of total bookings). The next most popular plane models are Airbus A220-300 (13.69%), Boeing 777-300ER (8.33%), and Airbus A321neo (7.14%).

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
Alaska Airlines	PriceFrom C$ 285	Free Cancellation	Rating 7.9 12,937 reviews	Search Alaska Airlines flights
WestJet	PriceFrom C$ 289	Free Cancellation	Rating 7.2 3,446 reviews	Search WestJet flights
Air Canada	PriceFrom C$ 369	Free Cancellation	Rating 7.1 11,644 reviews	Search Air Canada flights

Why use momondo?

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

It is quick and easy to find Seattle to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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 all potential Seattle to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Seattle to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Region of Ontario trip

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Popular Cities in Ontario

Flights to Torontofrom C$ 129

Flights to Vancouverfrom C$ 102

Flights to Calgaryfrom C$ 108

Flights to Montrealfrom C$ 232

Flights to Halifaxfrom C$ 159

Flights to Winnipegfrom C$ 145

Flights to Ottawafrom C$ 158

Flights to Kelownafrom C$ 108

Flights to Saskatoonfrom C$ 147

Flights to St. John'sfrom C$ 206

Flights to Reginafrom C$ 168

Flights to Québec Cityfrom C$ 315

Cheap flights from Seattle to Ontario from C$ 166

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 22/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Seattle to Ontario

Cheap round-trip flights

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Cheap last-minute flights

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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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Use the filters below to find and compare flights from Seattle to Ontario that are best for you.

See travel insights to Ontario from

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

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 Seattle/Tacoma Intl to Ontario flight route?

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

What cabin class options are available on Seattle to Region of Ontario flights?

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

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

Which airlines fly to Region of Ontario?

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

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

Cheap Seattle to Region of Ontario flight deals and tips

Best price found

Fastest flight time

Direct flights

Airports in Region of Ontario

Frequently asked questions about flying from Seattle to 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?

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

Seattle flight routes

According to popular flight searches on momondo this year

Region of Ontario flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year