Title: Cheap Flights from Montreal (YUL) to Seattle (BFI) - Expedia.ca ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_flights_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Montreal (YUL) to Seattle (BFI) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Trudeau International Airport (YUL) to Seattle, WA (BFI-Boeing Field) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![WestJet](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WS.svg) WestJet [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WS"}}]) - ![Flair Airlines](https://a.travel-assets.com/air/airlines/f8_sq.svg) Flair Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F8"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![Porter Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_PD.svg) Porter Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:yul,to:bfi,departure:21/10/2025TANYT&leg2=from:bfi,to:yul,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"PD"}}]) ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Alternative airports near Seattle Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:YUL,to:SEA,departure:21/10/2025TANYT&leg2=from:SEA,to:YUL,departure:25/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) SEA Seattle - Tacoma Intl. Cheapest 20 min [Flights from CA $440](https://www.expedia.ca/Flights-Search?leg1=from:YUL,to:SEA,departure:21/10/2025TANYT&leg2=from:SEA,to:YUL,departure:25/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) Flight from Montreal to Seattle (YUL - BFI) route information | Origin airport | Pierre Elliott Trudeau Intl. | | --- | --- | | Destination airport | Boeing Field | | Distance | 3641 km | ## Montreal to Seattle Flights **The easy way to book your flights from Montreal to Seattle**  With Expedia, it’s simple to find and book flights to Seattle from Montreal whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from airlines that cover this route. There are nonstop flights to Boeing Field, too.   Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Montreal to Seattle today, tomorrow, or this week.   **Save dollars with cheap flights from Pierre Elliott Trudeau Intl., YUL to Boeing Field, BFI**  Sort your search results by price to find great deals on your flight from Montreal to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Montreal currently is just rising to .   Here are more money-saving tips:  - Fly in when flight prices are normally at their lowest  - Book about a month to 6 weeks before you travel for the best prices to Seattle   - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times  - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free!  **Reasons to choose Expedia for your flight to Seattle from Montreal**  Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Seattle with Expedia today. ## Frequently asked questions ### How much is a flight from Montreal Airport to BFI? > Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from Pierre Elliott Trudeau Intl. Airport (YUL) to Boeing Field Airport (BFI) was . Fares this cheap don't hang around, so book yours today. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Pierre Elliott Trudeau Intl. Airport (YUL) to Boeing Field Airport (BFI)? > We get that life can throw the odd curveball, so we've made it as simple as possible for you to cancel your flight online. Just visit the [Customer Service Portal](https://www.expedia.ca/helpcenter) and follow the instructions. ### How do I find cheap flights from Montréal–Trudeau to Boeing Field that have flexible change policies? > Flights from YUL to BFI with flexible change policies are available with many carriers. Simply use our "No change fees" filter while searching. You'll only need to pay the fare difference, with no additional fees to worry about. ### How far is the flight from Montreal Airport to BFI? > You'll be up above the clouds for a while, as the flight distance between YUL and BFI is 3,700 kilometres. Set up a playlist of your favourite songs before you leave home to keep yourself entertained during the journey. ### Which airlines fly direct from Montréal–Trudeau to BFI? > If you want to travel straight from YUL to King County International Airport, you'll need to book a flight with at least one stop. Unfortunately, there are no airlines that fly directly on this route. ### Are YUL to Boeing Field Airport (BFI) flight tickets cheaper when they're purchased at the last minute? > Last-minute planners can sometimes score a bargain, with some of the cheapest airfares from YUL to King County International Airport popping up a few weeks prior to the departure date. If you'd rather plan ahead, Expedia compares and updates all the best flight deals regularly — as early as a year in advance in some cases. 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