$119+ 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 7/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
maj 31 — juni 71
Round-trip
1 adult, Economy
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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.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Montreal are usually found in March or September, booked 76 days in advance, depart on a Monday or Wednesday and return on a Wednesday
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 maj 1, 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 maj 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
tir. 8/47:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
fre. 8/76:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/28![WestJet logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 8/117:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
tir. 8/186:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/29![WestJet logo]()
$283
This Trip.com deal was found by Cheapflights users on 4/28. 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.
tir. 8/47:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
man. 8/106:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/28![WestJet logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
tir. 8/47:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
ons. 8/58:00 pm
YUL
- SEA
1 stop16h 40m
WestJet
Deal found 4/26![WestJet logo]()
$294
This Trip.com deal was found by Cheapflights users on 4/26. 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.
tir. 9/87:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
tir. 9/296:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/26![WestJet logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
tir. 8/187:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
tir. 8/258:00 pm
YUL
- SEA
1 stop16h 40m
WestJet
Deal found 4/26![WestJet logo]()
$296
This Trip.com deal was found by Cheapflights users on 4/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 9/107:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
tir. 9/156:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/29![WestJet logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
ons. 7/17:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
tir. 7/76:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/28![WestJet logo]()
$303
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 maj 1, 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 maj 1, 2026.
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 7/287:00 am
SEA
- YUL
1 stop13h 45m
WestJet
tir. 8/46:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/30![WestJet logo]()
$360
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 7/2410:30 am
SEA
- YUL
2 stops10h 55m
Multiple Airlines
tir. 7/283:10 pm
YUL
- SEA
3 stops21h 30m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 4/26. 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.
tir. 5/266:25 pm
SEA
- YUL
2 stops14h 34m
Delta
tir. 6/27:10 am
YUL
- SEA
2 stops12h 25m
Delta
Deal found 4/26![Delta logo]()
$563
This United Airlines deal was found by Cheapflights users on 4/27. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 5/305:00 pm
SEA
- YUL
1 stop14h 40m
United Airlines
tir. 6/23:25 pm
YUL
- SEA
1 stop11h 19m
United Airlines
Deal found 4/27![United Airlines logo]()
$584
This Justfly.com deal was found by Cheapflights users on 4/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 8/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
søn. 8/235:45 pm
YUL
- SEA
2 stops18h 55m
WestJet
Deal found 4/27![WestJet logo]()
$373
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 8/1910:30 am
SEA
- YUL
2 stops10h 55m
Multiple Airlines
søn. 8/238:30 am
YUL
- SEA
2 stops13h 15m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$519
This Delta deal was found by Cheapflights users on 4/28. 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.
tir. 5/269:30 am
SEA
- YUL
2 stops11h 11m
Delta
fre. 5/2912:40 pm
YUL
- SEA
2 stops20h 55m
Delta
Deal found 4/28![Delta logo]()
$583
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
tor. 5/287:35 pm
SEA
- YUL
1 stop15h 37m
Multiple Airlines
tor. 6/48:30 pm
YUL
- SEA
1 stop16h 10m
Multiple Airlines
Deal found 4/30![Multiple Airlines logo]()
$576
This Delta deal was found by Cheapflights users on 4/27. 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.
tor. 5/2810:35 am
SEA
- YUL
2 stops10h 06m
Delta
man. 6/16:00 am
YUL
- SEA
1 stop8h 05m
Delta
Deal found 4/27![Delta logo]()
$585
This Delta deal was found by Cheapflights users on 5/1. 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.
fre. 5/226:25 pm
SEA
- YUL
2 stops14h 34m
Delta
lør. 5/306:00 am
YUL
- SEA
1 stop11h 53m
Delta
Deal found 5/1![Delta logo]()
$596
Last-minute flights from Seattle to MontrealDiscover last-minute flight deals from Seattle to Montreal. Data last updated maj 1, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Montreal. Data last updated maj 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
tir. 5/1210:30 am
SEA
- YUL
1 stop10h 15m
WestJet
fre. 5/155:30 pm
YUL
- SEA
1 stop28h 15m
WestJet
Deal found 4/28![WestJet logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
ons. 5/137:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
søn. 5/177:50 pm
YUL
- SEA
2 stops16h 50m
WestJet
Deal found 4/27![WestJet logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
lør. 5/167:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
lør. 5/238:00 pm
YUL
- SEA
1 stop16h 40m
WestJet
Deal found 4/26![WestJet logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 4/26. 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.
lør. 5/167:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
fre. 5/227:15 am
YUL
- SEA
1 stop14h 30m
WestJet
Deal found 4/26![WestJet logo]()
$317
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 5/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
man. 5/258:00 pm
YUL
- SEA
1 stop16h 40m
WestJet
Deal found 4/30![WestJet logo]()
$347
This Trip.com deal was found by Cheapflights users on 4/27. 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.
man. 5/2510:30 am
SEA
- YUL
1 stop10h 15m
WestJet
tir. 5/266:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/27![WestJet logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
man. 5/257:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
man. 6/16:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/28![WestJet logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 4/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 5/2710:30 am
SEA
- YUL
2 stops10h 55m
WestJet
ons. 6/37:15 am
YUL
- SEA
1 stop29h 25m
WestJet
Deal found 4/29![WestJet logo]()
$341
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 5/2810:30 am
SEA
- YUL
2 stops10h 55m
WestJet
man. 6/16:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 4/30![WestJet logo]()
$349
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 maj 1, 2026.
Search for one-way flight options from Seattle to Montreal. Find affordable one-way fares based on user searches. Data last updated maj 1, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/28. 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.
tor. 7/167:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/28![WestJet logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 4/27. 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.
søn. 7/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/27![WestJet logo]()
$121
This Justfly.com deal was found by Cheapflights users on 4/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 7/177:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/27![WestJet logo]()
$123
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 7/17:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/30![WestJet logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
tor. 8/277:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/30![WestJet logo]()
$125
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 8/287:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/30![WestJet logo]()
$126
This Justfly.com deal was found by Cheapflights users on 4/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 9/257:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/26![WestJet logo]()
$128
This FlightHub deal was found by Cheapflights users on 4/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 7/247:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 4/27![WestJet logo]()
$133
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 maj 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $282 (Kiwi.com) |
One-way from | $119 (Kiwi.com) |
Popular in | December |
Cheapest in | March |
Average price | $721 |
Good round-trip deal | $3,219 or less |
Good one-way deal | $279 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 2,558,603 searches. Data last updated maj 1, 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 - YUL
SEAYUL
Seattle/Tacoma Intl
tir. 7/28
7:00 am-11:45 pm
1 stop13h 45m
Montreal Pierre Elliott Trudeau Intl
tir. 8/4
6:45 am-6:45 pm
2 stops15h 00m
$360
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
ons. 8/19
7:35 pm-7:05 am
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
søn. 8/23
5:45 pm-9:40 am
2 stops18h 55m
$373
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
fre. 7/24
10:30 am-12:25 am
2 stops10h 55m
Montreal Pierre Elliott Trudeau Intl
tir. 7/28
3:10 pm-9:40 am
3 stops21h 30m
$489
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
ons. 8/19
10:30 am-12:25 am
2 stops10h 55m
Montreal Pierre Elliott Trudeau Intl
søn. 8/23
8:30 am-6:45 pm
2 stops13h 15m
$519
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
tir. 5/26
6:25 pm-11:59 am
2 stops14h 34m
Montreal Pierre Elliott Trudeau Intl
tir. 6/2
7:10 am-4:35 pm
2 stops12h 25m
$563
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
tor. 5/28
7:35 pm-2:12 pm
1 stop15h 37m
Montreal Pierre Elliott Trudeau Intl
tor. 6/4
8:30 pm-9:40 am
1 stop16h 10m
$576
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
tir. 5/26
9:30 am-11:41 pm
2 stops11h 11m
Montreal Pierre Elliott Trudeau Intl
fre. 5/29
12:40 pm-6:35 am
2 stops20h 55m
$583
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
lør. 5/30
5:00 pm-10:40 am
1 stop14h 40m
Montreal Pierre Elliott Trudeau Intl
tir. 6/2
3:25 pm-11:44 pm
1 stop11h 19m
$584
Quickest round-trip
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
tor. 5/28
10:35 am-11:41 pm
2 stops10h 06m
Montreal Pierre Elliott Trudeau Intl
man. 6/1
6:00 am-11:05 am
1 stop8h 05m
$585
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
fre. 5/22
6:25 pm-11:59 am
2 stops14h 34m
Montreal Pierre Elliott Trudeau Intl
lør. 5/30
6:00 am-2:53 pm
1 stop11h 53m
$596
Showing 1-10 of 19 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 May.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 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
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 73 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, May is the cheapest month in which you can book a flight from Seattle to Montreal (average of $151). Flying from Seattle to Montreal in November is currently the most expensive (average of $310). 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?
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 maj 1, 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.
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Overall
7.9
Crew
8.5
Food
7.2
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
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Top 4 airlines flying from Seattle to Montreal
Discover the top 4 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 2,558,603 searches. Data last updated maj 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$441 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$265 | Average$571 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$280 | Average$689 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$310 | Average$651 | FlexibilityNo cancel fee | On-timeN/A |