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

Our cheapest airline available from Seattle to Montreal is WestJet. Our recent data shows that you can find tickets from as low as $385 on this airline. An additional option worth looking into is American Airlines, starting at $462. WestJet is priced at 36% lower than the current average price of a flight leaving 3 months from now.

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

The cheapest airline one-way is Sun Country Air, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from WestJet and American Airlines, as they are both options that can get you from Seattle to Montreal for a low price.

In terms of precipitation, rainfall in Montreal ranges from 2.5 - 4.4 inches per month. August is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Montreal when rainfall is around 2.5 in.

If weather is an important factor for your trip to Montreal, 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 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 15.8 F).

What are the cheapest flights from Seattle to Montreal?

Looking for the cheapest flight from Seattle to Montreal? While on average our users pay $986, our data indicates the cheapest price to be $188. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $401.

What are the most popular airlines that fly from Seattle to Montreal?

Before booking your flight from Seattle to Montreal check out the most popular airlines for this route: American Airlines, Air Canada or Delta.

What is the cheapest day to fly round-trip from Seattle to Montreal?

Users have found that leaving on a Sunday can be a cost-effective option. It’s possible to save up to 11% on your flight compared to booking on days when demand is much higher.

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

Find a great deal and save up to 156% by booking at least 49 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Seattle to Montreal within the next two weeks, with the cheapest ticket starting at $552.

What is the cheapest month to fly from Seattle to Montreal?

Due to multiple factors, expect to potentially pay more when booking in February. For low rates, May can be a great choice for travel to Montreal. Flights to Montreal from Seattle in May are about $606 on average during May, but can be found for as low as $239.

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

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Montreal. On average, Seattle/Tacoma Intl has 2 outbound flights to Montreal per day from 5 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

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

How can I find direct flights from Seattle to Montreal?

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

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

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

$173+ Flights from Seattle to Montreal

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in May or July, booked 48 days in advance, depart on a Monday or Thursday and return on a Monday

Cheap flight deals from Seattle to Montreal

Round-trip from	$385 (oojo)
One-way from	$173 (Kiwi.com)
Popular in	February
Cheapest in	May
Average price	$521
Good round-trip deal	$512 or less
Good one-way deal	$238 or less

From Seattle/Tacoma Intl to Montreal (YMQ)

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One-way flight from Seattle/Tacoma Intl to Montreal (YMQ)

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Highest demand for flights based on searches. 11% potential increase in price ($77 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Montreal (YMQ).

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Price to beat on a one-way flight from Seattle/Tacoma Intl to Montreal (YMQ).

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Find flight deals from Seattle to Montreal

Cheapest flights from Seattle to Montreal
Explore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Fri 10/31:15 pmSEA - YUL

2 stops32h 12mWestJet

Sun 10/57:00 amYUL - SEA

1 stop16h 29mWestJet

Deal found 7/1

$385

Mon 8/252:05 pmSEA - YUL

2 stops21h 07mMultiple Airlines

Wed 9/37:00 amYUL - SEA

1 stop8h 59mMultiple Airlines

Deal found 7/3

$390

Wed 10/82:52 pmSEA - YUL

1 stop17h 48mAmerican Airlines

Wed 10/1512:30 pmYUL - SEA

1 stop14h 57mAmerican Airlines

Deal found 7/3

$462

Best flights from Seattle to Montreal
Discover carefully curated flight deals from Seattle to Montreal that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Fri 10/31:15 pmSEA - YUL

2 stops32h 12mWestJet

Sun 10/57:00 amYUL - SEA

1 stop16h 29mWestJet

Deal found 7/1

$385

Mon 8/252:05 pmSEA - YUL

2 stops21h 07mMultiple Airlines

Wed 9/37:00 amYUL - SEA

1 stop8h 59mMultiple Airlines

Deal found 7/3

$390

Wed 10/82:52 pmSEA - YUL

1 stop17h 48mAmerican Airlines

Wed 10/1512:30 pmYUL - SEA

1 stop14h 57mAmerican Airlines

Deal found 7/3

$462

Last-minute flights from Seattle to Montreal
Discover last-minute flight deals from Seattle to Montreal. Data last updated July 3, 2025 and is based on user searches.

Tue 7/812:20 amSEA - YUL

1 stop7h 20mUnited Airlines

Wed 7/166:15 amYUL - SEA

1 stop8h 22mUnited Airlines

Deal found 7/1

$692

Wed 7/97:35 pmSEA - YUL

1 stop15h 40mMultiple Airlines

Wed 7/163:10 pmYUL - SEA

2 stops28h 15mMultiple Airlines

Deal found 7/1

$506

Wed 7/97:20 amSEA - YUL

Nonstop5h 09mAir Canada

Wed 7/165:45 pmYUL - SEA

Nonstop5h 56mAir Canada

Deal found 7/1

$562

Wed 7/97:35 pmSEA - YUL

2 stops25h 52mWestJet

Wed 7/166:45 amYUL - SEA

2 stops39h 36mWestJet

Deal found 7/1

$607

Thu 7/106:18 amSEA - YUL

1 stop7h 22mAmerican Airlines

Sun 7/137:29 amYUL - SEA

1 stop14h 49mAmerican Airlines

Deal found 7/2

$587

Mon 8/1812:46 amSEA - YUL

1 stop12h 56mAmerican Airlines

Tue 8/2612:30 pmYUL - SEA

1 stop14h 11mAmerican Airlines

Deal found 7/2

$466

Mon 8/252:05 pmSEA - YUL

2 stops21h 07mMultiple Airlines

Wed 9/37:00 amYUL - SEA

1 stop8h 59mMultiple Airlines

Deal found 7/3

$390

Mon 8/257:35 pmSEA - YUL

1 stop26h 08mWestJet

Wed 9/37:00 amYUL - SEA

1 stop8h 59mWestJet

Deal found 7/3

$413

Mon 8/257:20 amSEA - YUL

Nonstop5h 09mAir Canada

Wed 9/34:45 pmYUL - SEA

Nonstop5h 46mAir Canada

Deal found 7/3

$462

One-way flights from Seattle to Montreal
Search for one-way flight options from Seattle to Montreal. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Tue 9/163:39 pmSEA - YUL

2 stops19h 33mMultiple Airlines

Deal found 7/1

$173

Thu 9/256:31 pmSEA - YUL

1 stop15h 07mSun Country Air

Deal found 7/2

$175

Thu 9/257:05 amSEA - YUL

2 stops14h 22mWestJet

Deal found 7/2

$180

Tue 9/163:00 pmSEA - YUL

1 stop17h 45mAmerican Airlines

Deal found 7/1

$202

Mon 9/156:00 amSEA - YUL

2 stops12h 57mDelta

Deal found 7/3

$221

Thu 9/257:15 amSEA - YUL

Nonstop5h 13mAir Canada

Deal found 7/2

$228

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/25

2:05 pm-2:12 pm

2 stops21h 07m

Montreal Pierre Elliott Trudeau Intl

Wed 9/3

7:00 am-12:59 pm

1 stop8h 59m

$390

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Fri 9/26

1:15 pm-12:27 am

2 stops32h 12m

Montreal Pierre Elliott Trudeau Intl

Mon 9/29

6:45 am-12:59 pm

2 stops33h 14m

$408

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/25

7:20 am-3:29 pm

Nonstop5h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 9/3

4:45 pm-7:31 pm

Nonstop5h 46m

$462

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 8/18

12:46 am-4:42 pm

1 stop12h 56m

Montreal Pierre Elliott Trudeau Intl

Tue 8/26

12:30 pm-11:41 pm

1 stop14h 11m

$466

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 9/16

3:39 pm-2:12 pm

2 stops19h 33m

$173

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/25

6:31 pm-12:38 pm

1 stop15h 07m

$175

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/25

7:05 am-12:27 am

2 stops14h 22m

$180

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Tue 9/16

3:00 pm-11:45 am

1 stop17h 45m

$202

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Mon 9/15

6:00 am-9:57 pm

2 stops12h 57m

$221

SeattleMontreal

SEA - YUL

SEAYUL

Seattle/Tacoma Intl

Thu 9/25

7:15 am-3:28 pm

Nonstop5h 13m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Best time to book a flight from Seattle to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Seattle 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Montreal

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

The price you pay for your flight from Seattle to Montreal may vary depending on when you book. For the best chance of a lower fare, look to book 48 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Montreal (average of $270). Flying from Seattle to Montreal in July is currently the most expensive (average of $409). 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 SEA to YMQ?

It’s typically best to fly out from Seattle to Montreal in the afternoon. Doing so could potentially save you 61% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Seattle to Montreal?

Travelers seeking maximum savings on their Seattle to Montreal flight should consider departing on Sunday afternoons when fares are most often at their lowest. Wednesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Montreal

The most flights from SEA to YMQ are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

How much does it cost to fly round-trip from Seattle to Montreal?

Reviews of airlines servicing Montreal

Get a feel of what it's like to fly with Delta, American Airlines, and WestJet from Seattle to Montreal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,982 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

WestJet

7.2

Good

2,917 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

9,681 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Sun Country Air

6.9

Okay

339 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What airport do you fly from for flights from Seattle to Montreal?
Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Montreal. On average, Seattle/Tacoma Intl has 2 outbound flights to Montreal per day from 5 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.
What are the cheapest airlines flying from Seattle to Montreal round-trip?
Our cheapest airline available from Seattle to Montreal is WestJet. Our recent data shows that you can find tickets from as low as $385 on this airline. An additional option worth looking into is American Airlines, starting at $462. WestJet is priced at 36% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Seattle to Montreal one-way?
The cheapest airline one-way is Sun Country Air, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from WestJet and American Airlines, as they are both options that can get you from Seattle to Montreal for a low price.
What are the cheapest flights from Seattle to Montreal?
Looking for the cheapest flight from Seattle to Montreal? While on average our users pay $986, our data indicates the cheapest price to be $188. The most popular route (Seattle/Tacoma Intl - Montreal Pierre Elliott Trudeau Intl), is priced around $401.
Can I find deals for flights from Seattle to Montreal that include hotel bookings?
Yes. In addition to deals on Seattle to Montreal flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Seattle to Montreal?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Montreal.
Can I find deals for business class flights from Seattle to Montreal?
Yes. Cheapflights offers flight deals from Seattle to Montreal 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 Seattle to Montreal?
Currently, January is the cheapest month in which you can book a flight from Seattle to Montreal (average of $270). Flying from Seattle to Montreal in July is currently the most expensive (average of $409). 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

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Seattle to Montreal

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$228	Average$616	FlexibilityNo cancel fee	On-time69%
Air Canada	Cheapest$268	Average$608	FlexibilityNo cancel fee	On-time67%
WestJet	Cheapest$283	Average$497	FlexibilityNo cancel fee	On-time60%
Delta	Cheapest$455	Average$656	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$465	Average$668	FlexibilityNo cancel fee	On-time71%

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$173+ Cheap flights from Seattle (SEA) to Montreal (YMQ)

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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Montreal with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in May or July, booked 48 days in advance, depart on a Monday or Thursday and return on a Monday

Cheap flight deals from Seattle to Montreal

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Seattle to Montreal

Cheapest flights from Seattle to MontrealExplore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Seattle to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Seattle with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Montreal

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Montreal. Price data was last updated on June 27, 2025.

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

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

Find hourly flight availability from Seattle to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

What is the cheapest day to fly from Seattle to Montreal?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Montreal. Price data was last updated on November 10, 2024.

Weekly flight availability from Seattle to Montreal

Explore weekly flight availability from Seattle to Montreal. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 3, 2025.

How much does it cost to fly round-trip from Seattle to Montreal?

Reviews of airlines servicing Montreal

Get a feel of what it's like to fly with Delta, American Airlines, and WestJet from Seattle to Montreal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Montreal. 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 from for flights from Seattle to Montreal?

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

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

What are the cheapest flights from Seattle to Montreal?

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

How can I find direct flights from Seattle to Montreal?

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

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

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.

Alternative routes for Seattle to Montreal

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Seattle to Montreal

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Cheapest flights from Seattle to Montreal
Explore the most affordable flight options available from Seattle to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.