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Cheap Flights from Montreal (YUL) to Seattle (SEA)

View AU$310 flight on Wed, 23 Sept 2026Opens in a new window

Popular airlines from Trudeau International Airport (YUL) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Montreal (YUL) to Seattle (SEA)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Montreal (YUL) to Seattle (SEA)

May is typically the cheapest month to fly

From AU$355 - AU$777 per traveller.

Frequently asked questions

How much does a flight from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find one-way and return flights from YUL to SEA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when YUL to SEA ticket fares go up or down.
What is the cheapest month to fly from Montreal, QC (YUL) to Seattle, WA (SEA)?
The cheapest months to fly from Montreal, QC (YUL) to Seattle, WA (SEA) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Only one airline offers direct flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Air Canada operates 7 direct flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) every week.
How do I find cheap flights from Montreal, QC (YUL) to Seattle, WA (SEA)?
To find a cheap flight from Montreal, QC (YUL) to Seattle, WA (SEA), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best airline to fly with from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will differ from traveler to traveler. If you like to fly early, Air Canada offers early morning flights. If price is the most important factor, Air Canada typically offers the lowest fares. Air Canada offers the most daily flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from Montreal (YUL) to Seattle (SEA) are typically January and September, with average return flights around AU$670. These months can be a great option if you're looking for more affordable fares.
How many flights per day from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 63 connecting flights per day from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Some common connection points include Pearson Intl. (YYZ), Calgary Intl. (YYC), and O'Hare Intl. (ORD).
What is the earliest flight from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs around 5:00 AM. This service is offered by Air Canada. This is a seasonal service, active in May, June, July, August, September, and October. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Thursday, with around 44 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Air Canada, United, and Delta. While Thursday has the most flights, the number of flights is fairly consistent throughout the week, so you'll have plenty of choices no matter which day you choose to fly.
What are the most popular departure times for flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. Many major carriers, including Air Canada, Delta and United, offer flights during this window. Many travelers prefer this because it allows for an early start to their journey, often leading to an earlier arrival at their destination.
How long does it take to fly from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A nonstop flight from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically takes around 6 hours. This route covers a distance of approximately 3,666 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 9 hours. Flights with two or more stops can take even longer, often around 16 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Montreal, QC (YUL-Pierre Elliott Trudeau Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly business class or first class between YUL and SEA. Airlines that offer business class service on this route include:

  • Air Canada
  • Delta
  • American Airlines

First class cabins are available on:

  • Air Canada
  • United
  • Delta

How do I earn miles on a Montreal, QC (YUL) to Seattle, WA (SEA) flight with Expedia?
It's easy to earn miles on a Montreal, QC (YUL) to Seattle, WA (SEA) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle, WA (SEA) from Montreal, QC (YUL)?
From Pierre Elliott Trudeau Intl. (YUL), you can fly directly into Seattle - Tacoma Intl. (SEA) in Seattle. Some flights may connect through major hubs like Pearson Intl. (YYZ), Calgary Intl. (YYC), or Macdonald-Cartier Intl. (YOW) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Montreal, QC (YUL) to Seattle, WA (SEA) at the last minute?
Typically, booking a last minute flight from Montreal, QC (YUL) to Seattle, WA (SEA) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Montreal, QC (YUL) to Seattle, WA (SEA) flight and hotel package?
Securing a Montreal, QC (YUL) to Seattle, WA (SEA) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Montreal, QC (YUL) to Seattle, WA (SEA)?
If you booked your Montreal, QC (YUL) to Seattle, WA (SEA) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Pierre Elliott Trudeau Intl.
Destination airport
Seattle - Tacoma Intl.
Distance
3643 km

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Your quick guide to flights from Montreal to Seattle

Pick up great flights from Montreal to Seattle

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Montreal to Seattle. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Montreal to Seattle that take around hours.

Find cheap flights from Montreal to Seattle

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Montreal to Seattle around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to Seattle is normally in .

Reasons to book your flight from Montreal to Seattle with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Montreal to Seattle across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to Seattle right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Montreal to Seattle

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