$137+ 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YMQ
Oct 6 — Oct 131
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 34 days in advance, depart on a Wednesday or Sunday and return on a Monday
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 September 6, 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 September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 9/257:35 pm -
1 stop8h 30m
Sat 10/36:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/37:35 pm -
1 stop8h 30m
Sun 10/186:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sat 9/267:35 pm -
1 stop8h 30m
Wed 10/76:45 am -
2 stops15h 00m
Deal found 9/6![WestJet logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:35 pm -
1 stop8h 30m
Wed 10/216:45 am -
2 stops15h 00m
Deal found 9/3![WestJet logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/67:35 pm -
1 stop8h 30m
Mon 10/196:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Mon 10/197:35 pm -
1 stop8h 30m
Thu 10/226:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/27:35 pm -
1 stop8h 30m
Wed 10/146:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Mon 9/287:35 pm -
1 stop8h 30m
Wed 10/76:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 10/217:35 pm -
1 stop8h 30m
Wed 10/286:45 am -
2 stops10h 55m
Deal found 9/6![WestJet logo]()
$339
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/157:35 pm -
1 stop8h 30m
Mon 10/196:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 9/157:35 pm -
1 stop8h 30m
Tue 9/227:15 am -
1 stop14h 30m
Deal found 9/6![WestJet logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/37:35 pm -
1 stop8h 30m
Sat 10/108:00 pm -
1 stop16h 40m
Deal found 9/5![WestJet logo]()
$345
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 September 6, 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 September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/2. 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 10/147:35 pm -
1 stop8h 30m
Wed 10/217:15 am -
1 stop14h 30m
Deal found 9/2![WestJet logo]()
$350
This United deal was found by Cheapflights users on 9/1. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2210:45 pm -
1 stop11h 25m
Tue 2/233:10 pm -
1 stop8h 49m
Deal found 9/1![Multiple Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 9/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/227:32 pm -
2 stops14h 38m
Tue 2/234:45 pm -
1 stop8h 44m
Deal found 9/1![United Airlines logo]()
$466
This Delta deal was found by Cheapflights users on 9/1. 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 1/76:00 am -
1 stop6h 59m
Sun 1/1012:45 pm -
1 stop12h 20m
Deal found 9/1![Delta logo]()
$475
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Mon 10/266:12 am -
2 stops12h 18m
Thu 10/297:40 am -
2 stops11h 03m
Deal found 9/1![American Airlines logo]()
$480
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Tue 10/2011:13 pm -
1 stop15h 17m
Tue 10/273:00 pm -
1 stop9h 39m
Deal found 9/5![United Airlines logo]()
$486
This Delta deal was found by Cheapflights users on 9/3. 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 9/178:59 am -
1 stop11h 51m
Wed 9/2312:48 pm -
1 stop12h 17m
Deal found 9/3![Delta logo]()
$495
This Delta deal was found by Cheapflights users on 9/4. 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.
Fri 12/118:59 pm -
2 stops23h 59m
Fri 1/84:55 pm -
1 stop8h 10m
Deal found 9/4![Delta logo]()
$500
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Wed 9/235:20 pm -
1 stop11h 56m
Mon 10/56:35 pm -
1 stop9h 40m
Deal found 9/6![United Airlines logo]()
$506
This United Airlines deal was found by Cheapflights users on 9/5. 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.
Wed 9/307:00 am -
1 stop7h 30m
Mon 10/196:35 pm -
1 stop9h 40m
Deal found 9/5![United Airlines logo]()
$506
This Delta deal was found by Cheapflights users on 9/4. 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.
Sat 9/2612:00 pm -
1 stop8h 44m
Mon 10/512:48 pm -
1 stop12h 17m
Deal found 9/4![Delta logo]()
$516
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 9/277:00 am -
1 stop7h 30m
Thu 10/86:35 pm -
1 stop9h 40m
Deal found 9/6![United Airlines logo]()
$525
Last-minute flights from Seattle to MontrealDiscover last-minute flight deals from Seattle to Montreal. Data last updated September 6, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Montreal. Data last updated September 6, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 9/157:35 pm -
1 stop8h 30m
Tue 9/227:15 am -
1 stop14h 30m
Deal found 9/6![WestJet logo]()
$344
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 9/257:35 pm -
1 stop8h 30m
Sat 10/36:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Sat 9/267:35 pm -
1 stop8h 30m
Wed 10/76:45 am -
2 stops15h 00m
Deal found 9/6![WestJet logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Mon 9/287:35 pm -
1 stop8h 30m
Tue 10/66:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$338
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/27:35 pm -
1 stop8h 30m
Wed 10/146:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$337
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/37:35 pm -
1 stop8h 30m
Sun 10/186:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sat 10/37:35 pm -
1 stop8h 30m
Sat 10/108:00 pm -
1 stop16h 40m
Deal found 9/5![WestJet logo]()
$345
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/67:35 pm -
1 stop8h 30m
Mon 10/196:45 am -
2 stops15h 00m
Deal found 9/5![WestJet logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:35 pm -
1 stop8h 30m
Wed 10/216:45 am -
2 stops15h 00m
Deal found 9/3![WestJet logo]()
$333
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 10/157:35 pm -
1 stop8h 30m
Mon 10/196:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Mon 10/197:35 pm -
1 stop8h 30m
Thu 10/226:45 am -
2 stops15h 00m
Deal found 9/4![WestJet logo]()
$336
This Kiwi.com deal was found by Cheapflights users on 9/6. 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 10/217:35 pm -
1 stop8h 30m
Wed 10/286:45 am -
2 stops10h 55m
Deal found 9/6![WestJet logo]()
$339
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 September 6, 2026.
Search for one-way flight options from Seattle to Montreal. Find affordable one-way fares based on user searches. Data last updated September 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/117:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/137:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 10/147:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/5![WestJet logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 9/4. 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 9/157:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![WestJet logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$149
This FlightHub deal was found by Cheapflights users on 9/4. 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.
Fri 9/257:35 pm -
1 stop8h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![WestJet logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/710:30 am -
2 stops10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![WestJet logo]()
$158
This Trip.com deal was found by Cheapflights users on 9/6. 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 10/1810:30 am -
2 stops10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![WestJet logo]()
$159
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 September 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $324 (Kiwi.com) |
One-way from | $137 (Kiwi.com) |
Popular in | June |
Cheapest in | March |
Average price | $495 |
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 September 6, 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
Quickest round-trip
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sat 10/3
7:35 pm-7:05 am
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$142
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 10/13
7:35 pm-11:45 pm
1 stop25h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$183
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Fri 9/25
7:35 pm-4:45 pm
2 stops18h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$190
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 10/6
7:35 pm-4:45 pm
2 stops18h 10m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$193
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 1/5
7:05 pm-7:50 am
1 stop9h 45m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$204
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 11/24
7:05 pm-7:50 am
1 stop9h 45m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$204
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 2/9
11:28 pm-11:26 am
1 stop8h 58m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 10/6
8:25 am-11:22 pm
1 stop11h 57m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Tue 2/9
11:50 am-11:51 pm
1 stop9h 01m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$208
SeattleMontreal
SEA Seattle/Tacoma Intl - YUL Montreal Pierre Elliott Trudeau Intl
SEAYUL
Seattle/Tacoma Intl
Sun 10/4
10:30 am-4:45 pm
2 stops27h 15m
Montreal Pierre Elliott Trudeau Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$213
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 September.
| 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
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 $824). 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 $386 and $618 in September.The cheapest round-trip price found within the last 5 days was $324 on WestJet (Sep 25-Oct 3).
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 55 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 September 6, 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.
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Entertainment
7.8
Overall
7.8
Comfort
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.
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Alternative routes for Seattle to Montreal
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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 September 6, 2026.
Seattle and Montreal flights
Browse other Seattle and Montreal flight options. Last updated on September 6, 2026.
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Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$358 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$265 | Average$668 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$310 | Average$560 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$436 | Average$737 | FlexibilityNo cancel fee | On-time67% |