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Cheap flights from Montreal to Seattle from C$ 225

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montreal to Seattle departing on 14/1. 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 Montreal to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
6:45 a.m. - 2:20 p.m.YUL-SEA
34h 35m2 stops
WestJet Logo
3:10 p.m. - 12:43 a.m.SEA-YUL
30h 33m2 stops
C$ 384WestJet
Find Deal
Thu, 22 Jan - Wed, 28 Jan
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 517WestJet
Find Deal
Mon, 8 Dec - Thu, 11 Dec
Multiple Airlines Logo
6:45 a.m. - 4:36 p.m.YUL-SEA
12h 51m2 stops
Multiple Airlines Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 534Multiple Airlines
Find Deal
Mon, 8 Dec - Tue, 9 Dec
WestJet Logo
6:45 a.m. - 2:20 p.m.YUL-SEA
34h 35m2 stops
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 539WestJet
Find Deal
Sat, 6 Dec - Thu, 11 Dec
WestJet Logo
7:30 p.m. - 2:20 p.m.YUL-SEA
21h 50m1 stop
WestJet Logo
3:10 p.m. - 7:05 a.m.SEA-YUL
12h 55m1 stop
C$ 541WestJet
Find Deal
Tue, 9 Dec - Tue, 16 Dec
Multiple Airlines Logo
6:00 p.m. - 2:20 p.m.YUL-SEA
23h 20m1 stop
Multiple Airlines Logo
3:10 p.m. - 1:32 p.m.SEA-YUL
19h 22m1 stop
C$ 555Multiple Airlines
Find Deal
Sat, 6 Dec - Thu, 11 Dec
Delta Logo
12:50 p.m. - 10:23 p.m.YUL-SEA
12h 33m1 stop
Delta Logo
7:15 a.m. - 11:42 p.m.SEA-YUL
13h 27m2 stops
C$ 603Delta
Find Deal
Wed, 19 Nov - Mon, 24 Nov
Delta Logo
7:00 a.m. - 5:44 p.m.YUL-SEA
13h 44m1 stop
Delta Logo
9:43 a.m. - 11:42 p.m.SEA-YUL
10h 59m2 stops
C$ 604Delta
Find Deal
Mon, 17 Nov - Mon, 24 Nov
American Airlines Logo
7:14 a.m. - 7:42 p.m.YUL-SEA
15h 28m1 stop
American Airlines Logo
2:46 p.m. - 3:10 p.m.SEA-YUL
21h 24m1 stop
C$ 608American Airlines
Find Deal
Thu, 4 Dec - Sat, 13 Dec
American Airlines Logo
7:14 a.m. - 6:55 p.m.YUL-SEA
14h 41m2 stops
American Airlines Logo
12:38 a.m. - 3:24 p.m.SEA-YUL
11h 46m2 stops
C$ 636American Airlines
Find Deal
Sat, 6 Dec - Wed, 10 Dec

Delta flights from Montreal to Seattle

Our best Delta deals on Montreal to Seattle flight tickets
Delta
19 Nov
YUL12:50 p.m.Montreal Pierre Elliott Trudeau Intl
12h 33m
1 stop
SEA10:23 p.m.Seattle/Tacoma Intl
24 Nov
SEA7:15 a.m.Seattle/Tacoma Intl
13h 27m
2 stops
YUL11:42 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 603
Find similar
Delta
17 Nov
YUL7:00 a.m.Montreal Pierre Elliott Trudeau Intl
13h 44m
1 stop
SEA5:44 p.m.Seattle/Tacoma Intl
24 Nov
SEA9:43 a.m.Seattle/Tacoma Intl
10h 59m
2 stops
YUL11:42 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 604
Find similar
Delta
4 Dec
YUL7:10 a.m.Montreal Pierre Elliott Trudeau Intl
11h 25m
2 stops
SEA3:35 p.m.Seattle/Tacoma Intl
13 Dec
SEA9:35 p.m.Seattle/Tacoma Intl
11h 25m
2 stops
YUL12:00 p.m.Montreal Pierre Elliott Trudeau Intl
C$ 607
Find similar

WestJet flights from Montreal to Seattle

Our best WestJet deals on Montreal to Seattle flight tickets
WestJet
22 Jan
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 35m
2 stops
SEA2:20 p.m.Seattle/Tacoma Intl
28 Jan
SEA3:10 p.m.Seattle/Tacoma Intl
30h 33m
2 stops
YUL12:43 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 384
Find similar
WestJet
8 Dec
YUL7:30 p.m.Montreal Pierre Elliott Trudeau Intl
21h 50m
1 stop
SEA2:20 p.m.Seattle/Tacoma Intl
11 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 517
Find similar
WestJet
6 Dec
YUL6:45 a.m.Montreal Pierre Elliott Trudeau Intl
34h 35m
2 stops
SEA2:20 p.m.Seattle/Tacoma Intl
11 Dec
SEA3:10 p.m.Seattle/Tacoma Intl
12h 55m
1 stop
YUL7:05 a.m.Montreal Pierre Elliott Trudeau Intl
C$ 539
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Montreal to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 5 November 2025.
Use the filters below to find and compare flights from Montreal to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 22/1

6:45 a.m.-2:20 p.m.

2 stops34h 35m

Seattle/Tacoma Intl

Wed 28/1

3:10 p.m.-12:43 a.m.

2 stops30h 33m

C$ 384

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 8/12

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Thu 11/12

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 517

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 8/12

6:45 a.m.-4:36 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Tue 9/12

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 534

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

6:45 a.m.-2:20 p.m.

2 stops34h 35m

Seattle/Tacoma Intl

Thu 11/12

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 539

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 9/12

7:30 p.m.-2:20 p.m.

1 stop21h 50m

Seattle/Tacoma Intl

Tue 16/12

3:10 p.m.-7:05 a.m.

1 stop12h 55m

C$ 541

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

6:00 p.m.-2:20 p.m.

1 stop23h 20m

Seattle/Tacoma Intl

Thu 11/12

3:10 p.m.-1:32 p.m.

1 stop19h 22m

C$ 555

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Wed 19/11

12:50 p.m.-10:23 p.m.

1 stop12h 33m

Seattle/Tacoma Intl

Mon 24/11

7:15 a.m.-11:42 p.m.

2 stops13h 27m

C$ 603

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

7:00 a.m.-5:44 p.m.

1 stop13h 44m

Seattle/Tacoma Intl

Mon 24/11

9:43 a.m.-11:42 p.m.

2 stops10h 59m

C$ 604

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Thu 4/12

7:14 a.m.-7:42 p.m.

1 stop15h 28m

Seattle/Tacoma Intl

Sat 13/12

2:46 p.m.-3:10 p.m.

1 stop21h 24m

C$ 608

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

7:14 a.m.-6:55 p.m.

2 stops14h 41m

Seattle/Tacoma Intl

Wed 10/12

12:38 a.m.-3:24 p.m.

2 stops11h 46m

C$ 636

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Montreal 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 typical price of a round-trip flight between Montreal and Seattle?

What is the cheapest month to fly to Seattle?

If you aren’t able to travel to Seattle during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 676.

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

Our data shows that Friday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as C$ 688. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 792. These prices are subject to change though, so be sure to set up a Price Alert for flights to Seattle.

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

Our most recent data shows that the best time of day to fly to Seattle is in the evening. Flights from Montreal to Seattle during this time can be as low as C$ 571. Flights at noon are often more expensive with an average ticket price of C$ 770.

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

Fly from Montreal Pierre Elliott Trudeau Intl to Seattle/Tacoma Intl for the best Montreal - 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 Montreal when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around C$ 707 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Montreal for as low as C$ 507 on momondo.

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

There is only 1 cabin class available to choose from on Montreal 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 Montreal to Seattle flights?

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

How have Montreal to Seattle flight prices changed over time?

As of November 2025, prices for Montreal to Seattle flights are approximately 28% more expensive when compared to flights at the same time last year.

When to book flights from Montreal to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Montreal to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Montreal to Seattle (YMQ to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Montreal to Seattle

Best price found

C$ 1,331

Direct flights

None
The best flight deal from Montreal to Seattle found on momondo in the last 72 hours is C$ 1,331
There are no direct flights from Montreal to Seattle. Popular non-direct route for this connection is Montreal Pierre Elliott Trudeau Intl Airport - Seattle/Tacoma Intl Airport.
Search flight deals

  • How far is Montreal to Seattle/Tacoma Intl by plane?

    The straight-line distance from Montreal to Seattle/Tacoma Intl is 3672.5 km. In terms of flight time, this usually takes a little over 8h 38m.

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

    Prices for flights from Montreal to Seattle/Tacoma Intl Airport are updated daily.

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Montreal to Seattle/Tacoma Intl Airport.

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

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. 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 Montreal to Seattle?

  • What is the most popular airline from Montreal to Seattle?

Best airlines flying from Montreal to Seattle

Compare and see reviews for airlines that fly from Montreal to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom C$ 286Free CancellationRating
7.9
8,004 reviews
Search Delta flights
WestJetPriceFrom C$ 375Free CancellationRating
7.2
3,153 reviews
Search WestJet flights
American AirlinesPriceFrom C$ 465Free CancellationRating
7.2
11,039 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 510Free CancellationRating
7.1
10,404 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 545Free CancellationRating
7.4
9,001 reviews
Search United Airlines flights

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Lynnwood
Marysville
Tacoma
SeaTac
Kirkland
Olympia
Ocean Shores
Redmond
Ellensburg
Gig Harbor
Renton
Mukilteo
Cle Elum
Centralia
Federal Way
Shelton
Puyallup
Lakewood
Kent

Why use momondo?

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

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

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

Flights from Montreal to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Seattle from Montreal.

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

Yes. momondo can track prices for Montreal to Seattle 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.

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