$181+ Cheap flights from Seattle (SEA) to Pierre Elliott Trudeau Intl (YUL)
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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — YUL
Jul 8 — Jul 151
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl are usually found in October or August, booked 76 days in advance, depart on a Wednesday or Monday and return on a Friday
Cheap flight deals from Seattle to Pierre Elliott Trudeau Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Pierre Elliott Trudeau IntlExplore the most affordable flight options available from Seattle to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 8, 2026.
Explore the most affordable flight options available from Seattle to Pierre Elliott Trudeau Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 8, 2026.
This CheapOair deal was found by Cheapflights users on 6/8. 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.
Sun 10/47:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Sat 10/106:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/8![WestJet logo]()
$383
This Booking.com deal was found by Cheapflights users on 6/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Mon 9/148:00 pm
YUL
- SEA
1 stop25h 45m
WestJet
Deal found 6/8![WestJet logo]()
$400
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Tue 7/286:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/7![WestJet logo]()
$413
This Booking.com deal was found by Cheapflights users on 6/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Wed 7/89:30 pm
YUL
- SEA
1 stop15h 37m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$425
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Tue 7/289:30 pm
YUL
- SEA
1 stop15h 37m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$426
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Wed 7/291:00 pm
YUL
- SEA
1 stop11h 07m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$432
This Booking.com deal was found by Cheapflights users on 6/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Mon 9/286:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/8![WestJet logo]()
$433
This Mytrip deal was found by Cheapflights users on 6/7. 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.
Wed 9/97:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Wed 9/236:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/7![WestJet logo]()
$438
Best flights from Seattle to Pierre Elliott Trudeau IntlDiscover carefully curated flight deals from Seattle to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 8, 2026.
Discover carefully curated flight deals from Seattle to Pierre Elliott Trudeau Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 8, 2026.
This Booking.com deal was found by Cheapflights users on 6/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Mon 9/216:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/4![WestJet logo]()
$433
This Delta deal was found by Cheapflights users on 6/7. 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 9/296:00 am
SEA
- YUL
1 stop7h 19m
Delta
Wed 9/305:10 pm
YUL
- SEA
1 stop7h 52m
Delta
Deal found 6/7![Delta logo]()
$473
This Delta deal was found by Cheapflights users on 6/7. 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 9/239:10 am
SEA
- YUL
1 stop11h 47m
Delta
Wed 9/305:10 pm
YUL
- SEA
1 stop7h 52m
Delta
Deal found 6/7![Delta logo]()
$473
This Justfly.com deal was found by Cheapflights users on 6/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Tue 7/215:45 pm
YUL
- SEA
2 stops18h 55m
WestJet
Deal found 6/3![WestJet logo]()
$516
This Delta deal was found by Cheapflights users on 6/7. 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 9/239:10 am
SEA
- YUL
1 stop11h 47m
Delta
Sat 9/267:00 am
YUL
- SEA
1 stop8h 58m
Delta
Deal found 6/7![Delta logo]()
$473
This Mytrip deal was found by Cheapflights users on 6/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Sun 8/235:45 pm
YUL
- SEA
3 stops18h 55m
WestJet
Deal found 6/5![WestJet logo]()
$619
This Delta deal was found by Cheapflights users on 6/7. 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 7/37:30 am
SEA
- YUL
2 stops13h 12m
Delta
Mon 8/312:44 pm
YUL
- SEA
1 stop14h 13m
Delta
Deal found 6/7![Delta logo]()
$632
This Delta deal was found by Cheapflights users on 6/8. 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 7/18:40 am
SEA
- YUL
1 stop12h 15m
Delta
Wed 7/157:00 am
YUL
- SEA
1 stop10h 50m
Delta
Deal found 6/8![Delta logo]()
$641
This Delta deal was found by Cheapflights users on 6/8. 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 8/39:35 am
SEA
- YUL
2 stops11h 05m
Delta
Tue 8/2512:44 pm
YUL
- SEA
1 stop14h 13m
Delta
Deal found 6/8![Delta logo]()
$648
This Delta deal was found by Cheapflights users on 6/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:59 pm
SEA
- YUL
2 stops11h 40m
Delta
Sat 8/296:00 am
YUL
- SEA
2 stops13h 37m
Delta
Deal found 6/6![Delta logo]()
$657
This Delta deal was found by Cheapflights users on 6/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/278:59 pm
SEA
- YUL
2 stops11h 57m
Delta
Thu 7/307:00 am
YUL
- SEA
1 stop12h 49m
Delta
Deal found 6/5![Delta logo]()
$667
This Delta deal was found by Cheapflights users on 6/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:59 pm
SEA
- YUL
2 stops11h 40m
Delta
Sun 8/306:00 am
YUL
- SEA
2 stops10h 30m
Delta
Deal found 6/6![Delta logo]()
$678
Last-minute flights from Seattle to Pierre Elliott Trudeau IntlDiscover last-minute flight deals from Seattle to Pierre Elliott Trudeau Intl. Data last updated June 8, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Pierre Elliott Trudeau Intl. Data last updated June 8, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/27:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Wed 7/89:30 pm
YUL
- SEA
1 stop15h 37m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$425
This Booking.com deal was found by Cheapflights users on 6/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Thu 7/166:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/6![WestJet logo]()
$433
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Tue 7/286:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/7![WestJet logo]()
$413
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Tue 7/289:30 pm
YUL
- SEA
1 stop15h 37m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$426
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2010:30 am
SEA
- YUL
2 stops10h 55m
WestJet
Mon 7/276:45 am
YUL
- SEA
2 stops15h 00m
WestJet
Deal found 6/5![WestJet logo]()
$436
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/237:35 pm
SEA
- YUL
1 stop8h 30m
Multiple Airlines
Wed 7/291:00 pm
YUL
- SEA
1 stop11h 07m
Multiple Airlines
Deal found 6/7![Multiple Airlines logo]()
$432
One-way flights from Seattle to Pierre Elliott Trudeau IntlSearch for one-way flight options from Seattle to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
Search for one-way flight options from Seattle to Pierre Elliott Trudeau Intl. Find affordable one-way fares based on user searches. Data last updated June 8, 2026.
This FlipMilhas deal was found by Cheapflights users on 6/4. 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 FlipMilhas is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:00 am
SEA
- YUL
1 stop7h 52m
GOL
Deal found 6/4![GOL logo]()
$181
This CheapOair deal was found by Cheapflights users on 6/6. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 6/6![WestJet logo]()
$185
This CheapOair deal was found by Cheapflights users on 6/5. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/197:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 6/5![WestJet logo]()
$186
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 6/7![WestJet logo]()
$187
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:35 pm
SEA
- YUL
1 stop8h 30m
WestJet
Deal found 6/5![WestJet logo]()
$188
This Booking.com deal was found by Cheapflights users on 6/7. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1910:30 am
SEA
- YUL
2 stops10h 55m
WestJet
Deal found 6/7![WestJet logo]()
$196
This CheapOair deal was found by Cheapflights users on 6/8. 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.
Fri 7/1710:30 am
SEA
- YUL
2 stops10h 55m
WestJet
Deal found 6/8![WestJet logo]()
$198
This American Airlines deal was found by Cheapflights users on 6/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:00 am
SEA
- YUL
1 stop7h 47m
American Airlines
Deal found 6/5![American Airlines logo]()
$202
This Delta deal was found by Cheapflights users on 6/8. 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 7/18:40 am
SEA
- YUL
1 stop12h 15m
Delta
Deal found 6/8![Delta logo]()
$207
Find flight deals from Seattle to Pierre Elliott Trudeau Intl
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Pierre Elliott Trudeau Intl (YUL). 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 June 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $383 (CheapOair) |
One-way from | $181 (FlipMilhas) |
Popular in | January |
Cheapest in | October |
Average price | $758 |
Good round-trip deal | $3,219 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Pierre Elliott Trudeau Intl 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 June 8, 2026.
Use the filters below to find and compare flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Fri 9/18
7:35 pm-7:05 am
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Mon 9/21
6:45 am-6:45 pm
2 stops15h 00m
$433
Quickest round-trip
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Tue 9/29
6:00 am-4:19 pm
1 stop7h 19m
Montreal Pierre Elliott Trudeau Intl
Wed 9/30
5:10 pm-10:02 pm
1 stop7h 52m
$473
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Wed 9/23
9:10 am-11:57 pm
1 stop11h 47m
Montreal Pierre Elliott Trudeau Intl
Wed 9/30
5:10 pm-10:02 pm
1 stop7h 52m
$473
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Wed 9/23
9:10 am-11:57 pm
1 stop11h 47m
Montreal Pierre Elliott Trudeau Intl
Sat 9/26
7:00 am-12:58 pm
1 stop8h 58m
$473
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Thu 7/16
7:35 pm-7:05 am
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Tue 7/21
5:45 pm-9:40 am
2 stops18h 55m
$516
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Thu 8/20
7:35 pm-7:05 am
1 stop8h 30m
Montreal Pierre Elliott Trudeau Intl
Sun 8/23
5:45 pm-9:40 am
3 stops18h 55m
$619
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Fri 7/3
7:30 am-11:42 pm
2 stops13h 12m
Montreal Pierre Elliott Trudeau Intl
Mon 8/3
12:44 pm-11:57 pm
1 stop14h 13m
$632
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Wed 7/1
8:40 am-11:55 pm
1 stop12h 15m
Montreal Pierre Elliott Trudeau Intl
Wed 7/15
7:00 am-2:50 pm
1 stop10h 50m
$641
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Mon 8/3
9:35 am-11:40 pm
2 stops11h 05m
Montreal Pierre Elliott Trudeau Intl
Tue 8/25
12:44 pm-11:57 pm
1 stop14h 13m
$648
SeattleMontreal
SEA - YUL
SEAYUL
Seattle/Tacoma Intl
Sun 8/23
8:59 pm-11:39 am
2 stops11h 40m
Montreal Pierre Elliott Trudeau Intl
Sat 8/29
6:00 am-4:37 pm
2 stops13h 37m
$657
Showing 1-10 of 22 resultsSorted by cheapest first
- Most accurate provider: When it comes to deals on Seattle-Montreal Pierre Elliott Trudeau Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Montreal Pierre Elliott Trudeau Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Montreal Pierre Elliott Trudeau Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Montreal Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl Airport 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 Pierre Elliott Trudeau Intl
Have a flexible travel schedule? Discover the best time to fly to Pierre Elliott Trudeau Intl from Seattle with our price prediction graph.
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 Pierre Elliott Trudeau Intl Airport
How far ahead should I book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?
The best time to book flights from Seattle to Montreal Pierre Elliott Trudeau Intl Airport is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport?
Currently, October is the cheapest month in which you can book a flight from Seattle to Montreal Pierre Elliott Trudeau Intl Airport (average of $499). Flying from Seattle to Montreal Pierre Elliott Trudeau Intl Airport in January is currently the most expensive (average of $1,002). 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 Pierre Elliott Trudeau Intl Airport?
Reviews of airlines servicing Pierre Elliott Trudeau Intl
Get insights into the airlines that provide service to Pierre Elliott Trudeau Intl. 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 Pierre Elliott Trudeau Intl. Reviews last updated June 8, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andWestJet from Seattle to Montreal Pierre Elliott Trudeau Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.9
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.9
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.9
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Overall
7.9
Entertainment
7.8
Comfort
7.8
Food
7.2
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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Top 4 airlines flying from Seattle to Pierre Elliott Trudeau Intl
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$265 | Average$600 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$281 | Average$369 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$310 | Average$575 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$335 | Average$710 | FlexibilityNo cancel fee | On-time67% |