Find flights
When to book
Airlines
FAQs

Cheap flights from Montreal to Seattle from C$ 247

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/3. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — SEA
26 Feb — 5 Mar1
1 adult

The best prices from Montreal to Seattle/Tacoma Intl are usually found in August or October, booked 17 days in advance, depart on a Wednesday or Friday and return on a Sunday

Cheap flight deals from Montreal to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 February 2025.

Round-trip from

C$ 496

One-way from

C$ 247

Popular in

December

Cheapest in

August

Average price

C$ 763

Good round-trip deal

C$ 642 or less

Good one-way deal

C$ 401 or less
6/4-13/4
  • 6/4-13/4
  • 3 total stops
  • 29h 50m total
  • Montreal to Seattle
Search Deals
18/3
  • 18/3
  • 3 total stops
  • 22h 13m total
  • Montreal to Seattle
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to Seattle/Tacoma Intl.
Search Deals

Find flight deals from Montreal to Seattle

Cheapest flights from Montreal to Seattle
Explore the most affordable flight options available from Montreal to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 February 2025.

Sun 6/46:45 a.m.YUL - SEA
2 stops10h 36mMultiple Airlines
Sun 13/43:15 p.m.SEA - YUL
1 stop19h 14mMultiple Airlines
Deal found 21/2C$ 496
Tue 3/67:00 a.m.YUL - SEA
1 stop8h 58mWestJet
Tue 10/62:05 p.m.SEA - YUL
1 stop7h 38mWestJet
Deal found 21/2C$ 503
Tue 8/46:05 a.m.YUL - SEA
2 stops15h 34mDelta
Thu 10/412:00 p.m.SEA - YUL
1 stop8h 38mDelta
Deal found 20/2C$ 558
Tue 18/31:25 p.m.YUL - SEA
1 stop8h 00mAir Canada
Tue 1/410:25 a.m.SEA - YUL
1 stop7h 22mAir Canada
Deal found 20/2C$ 616
Sun 6/412:30 p.m.YUL - SEA
1 stop13h 39mAmerican Airlines
Sun 13/41:35 p.m.SEA - YUL
1 stop19h 09mAmerican Airlines
Deal found 21/2C$ 710
Mon 2/68:05 a.m.YUL - SEA
2 stops16h 06mUnited Airlines
Tue 10/65:14 p.m.SEA - YUL
1 stop10h 42mUnited Airlines
Deal found 21/2C$ 737

Find flights from Montreal to Seattle within your budget

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, Cheapflights users made 629,999 searches. Data last updated 21 February 2025.

Fly from

Montreal

Fly to

Seattle

Route

Depart

Return

Price

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 6/4

6:45 a.m.-2:21 p.m.

2 stops10h 36m

Seattle/Tacoma Intl

Sun 13/4

3:15 p.m.-1:29 p.m.

1 stop19h 14m

C$ 496

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 3/6

7:00 a.m.-12:58 p.m.

1 stop8h 58m

Seattle/Tacoma Intl

Tue 10/6

2:05 p.m.-12:43 a.m.

1 stop7h 38m

C$ 503

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 8/4

6:05 a.m.-6:39 p.m.

2 stops15h 34m

Seattle/Tacoma Intl

Thu 10/4

12:00 p.m.-11:38 p.m.

1 stop8h 38m

C$ 558

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 18/3

1:25 p.m.-6:25 p.m.

1 stop8h 00m

Seattle/Tacoma Intl

Tue 1/4

10:25 a.m.-8:47 p.m.

1 stop7h 22m

C$ 616

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sun 6/4

12:30 p.m.-11:09 p.m.

1 stop13h 39m

Seattle/Tacoma Intl

Sun 13/4

1:35 p.m.-11:44 a.m.

1 stop19h 09m

C$ 710

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Mon 2/6

8:05 a.m.-9:11 p.m.

2 stops16h 06m

Seattle/Tacoma Intl

Tue 10/6

5:14 p.m.-6:56 a.m.

1 stop10h 42m

C$ 737

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 18/3

1:30 p.m.-8:43 a.m.

3 stops22h 13m

C$ 247

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 3/5

7:30 a.m.-2:13 p.m.

1 stop9h 43m

C$ 344

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Tue 4/3

1:30 p.m.-2:21 p.m.

2 stops27h 51m

C$ 355

MontrealSeattle

YUL - SEA

YULSEA

Montreal Pierre Elliott Trudeau Intl

Sat 26/4

6:10 a.m.-2:55 p.m.

2 stops11h 45m

C$ 358

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/2

Showing 1-10 of 12 results
1
2

Best time to book a flight from Montreal to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Montreal with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Montreal to Seattle

Get recent, data-driven insights about flights from Montreal to Seattle including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Montreal to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Montreal to Seattle. Price data was last updated on 14 February 2025.

Booking 17 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Montreal to Seattle?

Currently, January is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 262). Flying from Montreal to Seattle in April is currently the most expensive (average of C$ 382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YMQ to SEA?

Find hourly flight availability from Montreal to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 February 2025.

A simple way to save on the total cost of your ticket is to fly from Montreal to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the afternoon.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 21 February 2025.
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,217 reviews
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,761 reviews
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

WestJet
7.2
Good
2,800 reviews
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air Canada
7.0
Good
8,756 reviews
Delta
8.0
Very good
8,217 reviews
Check prices

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Montreal to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Montreal?

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Montreal. Booking flights from Montreal to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 0 daily inbound flights from Montreal from 5 different airlines.

  • What are the cheapest airlines flying from Montreal to Seattle round-trip?

    WestJet, at C$ 503, was found to be the cheapest airline from Montreal to Seattle.Alternate airlines to your destination round-trip include Delta and Air Canada. WestJet is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Montreal to Seattle one-way?

    The cheapest airlines for a one-way flight from Montreal to Seattle are Air Canada (C$ 344), WestJet (C$ 355), and Delta (C$ 358).

  • What are the cheapest flights from Montreal to Seattle?

    While on average a flight from Montreal to Seattle is generally C$ 651, our data shows the cheapest flight currently is C$ 398. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - Seattle/Tacoma Intl), you can expect to pay C$ 494 for that flight.

  • Can I find deals for flights from Montreal to Seattle that include hotel bookings?

    Yes. In addition to deals on Montreal to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Montreal to Seattle.

  • Can I find deals for business class flights from Montreal to Seattle?

    Yes. Cheapflights offers flight deals from Montreal to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Montreal to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Montreal to Seattle (average of C$ 262). Flying from Montreal to Seattle in April is currently the most expensive (average of C$ 382). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Montreal?

Book flights to Montreal if you plan to visit one of these locations
SeaTac
Tukwila
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Montreal to Seattle

Discover the top 5 airlines that operate flights from Montreal to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 407AverageC$ 646FlexibilityNo cancel feeOn-time60%
Search WestJet flights
DeltaCheapestC$ 522AverageC$ 696FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapestC$ 544AverageC$ 747FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air CanadaCheapestC$ 563AverageC$ 750FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 585AverageC$ 767FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Montreal to Seattle?

Cheapflights helps you search for flights from Montreal to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Seattle?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Montreal to Seattle.

Can Cheapflights find flights from Montreal to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Montreal? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Montreal to Seattle become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.