$232+ Cheap flights from Seattle (SEA) to Montreal (YMQ)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Dec 3 — Dec 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Montreal with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Montreal
Cheapest
Best
Last-minute
One-way
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 November 3, 2026.
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 November 3, 2026.
This Kissandfly.com deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/41:45 pm -
1 stop6h 56m
Thu 12/107:30 am -
1 stop10h 07m
Deal found 10/29![Air Canada logo]()
$505
This Gotogate deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/113:15 pm -
2 stops12h 55m
Sun 12/131:05 pm -
2 stops11h 52m
Deal found 11/1![Air Canada logo]()
$506
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:30 pm -
1 stop24h 05m
Wed 12/94:15 pm -
1 stop24h 25m
Deal found 11/2![WestJet logo]()
$516
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:30 pm -
1 stop21h 20m
Sat 12/128:00 pm -
2 stops20h 40m
Deal found 11/2![WestJet logo]()
$523
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:46 am -
2 stops12h 46m
Wed 12/94:15 pm -
1 stop24h 25m
Deal found 11/2![Multiple Airlines logo]()
$525
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/89:34 pm -
1 stop30h 26m
Sat 12/128:00 am -
1 stop9h 39m
Deal found 11/1![Multiple Airlines logo]()
$528
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:40 pm -
1 stop9h 56m
Wed 12/97:10 am -
1 stop8h 21m
Deal found 11/2![Delta logo]()
$535
Best flights from Seattle to MontrealDiscover 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 November 3, 2026.
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 November 3, 2026.
This Gotogate deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:40 am -
1 stop8h 50m
Thu 12/108:30 am -
2 stops12h 52m
Deal found 10/29![Air Canada logo]()
$510
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1311:59 pm -
1 stop8h 37m
Fri 12/187:10 am -
1 stop13h 00m
Deal found 10/31![Delta logo]()
$549
This United deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1311:15 pm -
1 stop11h 13m
Fri 11/2710:40 am -
2 stops13h 19m
Deal found 10/29![Multiple Airlines logo]()
$627
This Alaska Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2411:39 pm -
1 stop12h 35m
Tue 1/54:00 pm -
1 stop21h 47m
Deal found 11/2![Alaska Airlines logo]()
$656
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/107:54 pm -
2 stops24h 47m
Mon 12/1412:41 pm -
1 stop14h 14m
Deal found 11/1![Delta logo]()
$556
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/18:30 am -
1 stop12h 18m
Tue 12/87:10 am -
1 stop13h 00m
Deal found 11/3![Delta logo]()
$560
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:25 am -
1 stop12h 23m
Mon 11/236:00 am -
1 stop11h 55m
Deal found 11/3![Delta logo]()
$572
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/309:55 pm -
1 stop10h 42m
Tue 1/56:00 am -
1 stop11h 40m
Deal found 10/29![Delta logo]()
$597
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2811:14 pm -
1 stop9h 45m
Mon 1/46:00 am -
1 stop11h 40m
Deal found 10/29![Delta logo]()
$597
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:35 pm -
1 stop6h 52m
Sun 11/227:10 am -
1 stop13h 00m
Deal found 10/31![Delta logo]()
$602
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/121:50 pm -
1 stop6h 40m
Sun 11/157:10 am -
1 stop13h 00m
Deal found 10/30![Delta logo]()
$624
Last-minute flights from Seattle to MontrealDiscover last-minute flight deals from Seattle to Montreal. Data last updated November 3, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Montreal. Data last updated November 3, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:36 pm -
2 stops25h 56m
Wed 12/94:15 pm -
1 stop24h 25m
Deal found 11/2![Multiple Airlines logo]()
$545
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:30 pm -
1 stop24h 05m
Wed 12/94:15 pm -
1 stop24h 25m
Deal found 11/2![WestJet logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:46 am -
2 stops12h 46m
Wed 12/94:15 pm -
1 stop24h 25m
Deal found 11/2![Multiple Airlines logo]()
$525
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:40 pm -
1 stop9h 56m
Wed 12/97:10 am -
1 stop8h 21m
Deal found 11/2![Delta logo]()
$535
This Trip.com deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/62:30 pm -
1 stop21h 20m
Sat 12/128:00 pm -
2 stops20h 40m
Deal found 11/2![WestJet logo]()
$523
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/611:50 am -
1 stop8h 58m
Sat 12/1212:50 pm -
1 stop12h 13m
Deal found 10/30![Delta logo]()
$548
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/89:34 pm -
1 stop30h 26m
Sat 12/128:00 am -
1 stop9h 39m
Deal found 11/1![Multiple Airlines logo]()
$528
This Gotogate deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/113:15 pm -
2 stops12h 55m
Sun 12/131:05 pm -
2 stops11h 52m
Deal found 11/1![Air Canada logo]()
$506
One-way flights from Seattle to MontrealSearch for one-way flight options from Seattle to Montreal. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
Search for one-way flight options from Seattle to Montreal. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
This Trip.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/215:48 pm -
1 stop16h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$232
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/196:00 am -
1 stop6h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Delta logo]()
$245
This American Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/196:00 am -
2 stops13h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![American Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/229:37 pm -
1 stop30h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1111:29 am -
1 stop16h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$255
This CheapOair deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/32:30 pm -
1 stop21h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![WestJet logo]()
$257
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/106:00 am -
1 stop6h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Delta logo]()
$272
This Air Canada deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/213:15 pm -
2 stops12h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Air Canada logo]()
$274
This Air Canada deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/93:15 pm -
2 stops12h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Air Canada logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2410:03 am -
1 stop18h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$280
Find flight deals from Seattle to Montreal
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Montreal (YMQ). 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 November 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $506 (Gotogate) |
One-way from | $232 (Trip.com) |
Popular in | June |
Cheapest in | March |
Average price | $653 |
Good round-trip deal | $620 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Montreal 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 7,457,451 searches. Data last updated November 3, 2026.
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
Cheapest round-trip
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Mon 12/14
6:00 am-5:33 pm
1 stop8h 33m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Fri 1/15
6:00 am-5:35 pm
1 stop8h 35m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 12/13
11:59 pm-11:36 am
1 stop8h 37m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 1/19
6:00 am-3:59 pm
1 stop6h 59m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
Quickest round-trip
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 2/14
1:45 pm-11:28 pm
1 stop6h 43m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 2/9
6:00 am-3:59 pm
1 stop6h 59m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$245
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 11/22
9:53 pm-7:00 am
3 stops30h 07m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$273
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sat 11/21
3:15 pm-7:10 am
2 stops12h 55m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$274
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Mon 12/21
8:00 am-11:49 pm
1 stop12h 49m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$311
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 12/20
9:30 am-11:29 pm
1 stop10h 59m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$311
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Seattle to Montreal
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Montreal in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Montreal flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Montreal flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Montreal flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Montreal flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Montreal flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
SEA-YMQ
SEA-YUL
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
SEA-YMQ
SEA-YUL
What is the cheapest month to book a flight from Seattle to Montreal?
Currently, March is the cheapest month in which you can book a flight from Seattle to Montreal (average of $467). Flying from Seattle to Montreal in December is currently the most expensive (average of $800). 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.
How much does it cost to fly round-trip from Seattle to Montreal?
Airfare is below average for this route at the moment.
Seattle to Montreal flights typically cost between $560 and $712 in December.The cheapest round-trip price found within the last 5 days was $506 on Air Canada (Dec 11-Dec 13).
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 54 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Reviews of airlines servicing Montreal
Get insights into the airlines that provide service to Montreal. 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 Montreal. Reviews last updated November 3, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andWestJet 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.
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Crew
8.5
Food
7.2
Comfort
7.8
Boarding
8.1
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
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
Complete your trip
Flights by cabin class
Montreal flight routes
Other flight options
Other flights from Seattle
Popular flights
Alternative routes for Seattle to Montreal
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Montreal by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Montreal by cabin class
Find flights from Seattle to Montreal, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Montreal
Explore flights to Montreal departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on November 3, 2026.
Seattle and Montreal flights
Browse other Seattle and Montreal flight options. Last updated on November 3, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on November 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Seattle to Montreal
Discover the top 5 airlines that operate flights from Seattle to Montreal. 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 7,457,451 searches. Data last updated November 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$358 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$244 | Average$667 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$265 | Average$668 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$389 | Average$673 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$462 | Average$725 | FlexibilityNo cancel fee | On-time67% |