Title: Cheap Flights from Seattle (BFI) to Boston (BOS) - Expedia.ca ![Boston](https://images.trvl-media.com/place/178239/8970bbdd-3367-4cf8-9ec8-fe9a12776371.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178239/8970bbdd-3367-4cf8-9ec8-fe9a12776371.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Seattle (BFI) to Boston (BOS) - [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 Seattle, WA (BFI-Boeing Field) to Logan International Airport (BOS) - ![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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&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:bfi,to:bos,departure:03/10/2025TANYT&leg2=from:bos,to:bfi,departure:10/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"PD"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 30% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) Flight from Seattle to Boston (BFI - BOS) route information | Origin airport | Boeing Field | | --- | --- | | Destination airport | Logan Intl. | | Distance | 3978 km | ## Seattle to Boston Flights **The easy way to book your flights from Seattle to Boston**  With Expedia, it’s simple to find and book flights to Boston from Seattle 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 Logan Intl., 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 Seattle to Boston today, tomorrow, or this week.   **Save dollars with cheap flights from Boeing Field, BFI to Logan Intl., BOS**  Sort your search results by price to find great deals on your flight from Seattle to Boston—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Boston from Seattle 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 Boston   - 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 Boston from Seattle**  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 Boston with Expedia today. ## Frequently asked questions ### How much is a flight from Boeing Field to BOS? > The lowest price advertised for a round-trip flight between BFI and BOS is . But you better act fast. This price is based on fares offered within the last 7 days on Expedia for flights departing within the next year. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Boeing Field Airport (BFI) to BOS? > The majority of flights can be conveniently cancelled online, but whether or not you are charged a fee varies between airlines. If you do have to cancel your escape, follow the easy instructions in the [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Boeing Field to BOS that have flexible change policies? > Use our "No change fees" filter to find flexible ticketing options for your flight from Boeing Field to Logan Intl. Airport (BOS). This allows you to snag a good price ahead of time and still have the freedom to reschedule without any extra fees. You'll just need to pay the fare difference, if applicable. ### How far is the flight from King County International Airport to BOS? > Seattle to Boston is around 4,000 kilometres, so get ready to spend a while in the air. Make sure you pack all the essentials, from your eye mask to your earphones. Toss in some snacks to munch on throughout your journey too. ### Which airlines fly direct from Boeing Field Airport (BFI) to BOS? > If you want to fly straight from Boeing Field to Logan Intl. Airport (BOS), you'll have to book a flight with at least one stop. Unfortunately, there are no airlines that fly directly between these airports. ### Are King County International Airport to BOS flight tickets cheaper when they're purchased at the last minute? > Booking your trip from BFI to Logan Intl. Airport at the last minute could be your ticket to a cheap deal. However, it could end up costing you a whole lot more! If you'd rather play it safe, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains as far ahead as 12 months in advance. If your preferred carrier hasn't released tickets yet, check back frequently as deals are updated all the time on Expedia. ## Explore a world of travel with Expedia - Lodging - Flights ### Lodging - [Boston Hotels](https://www.expedia.ca/Boston-Hotels.d178239.Travel-Guide-Hotels) ### Flights - [Flights from Amsterdam to Cambridge](https://www.expedia.ca/lp/flights/178229/8093/amsterdam-to-cambridge) - [Flights from Austin to Cambridge](https://www.expedia.ca/lp/flights/178234/8093/austin-to-cambridge) - [Flights from Calgary to Boston](https://www.expedia.ca/lp/flights/178245/178239/calgary-to-boston) - [Flights from Chicago to Cambridge](https://www.expedia.ca/lp/flights/178248/8093/chicago-to-cambridge) - [Flights from Cleveland to Cambridge](https://www.expedia.ca/lp/flights/178250/8093/cleveland-to-cambridge) - [Flights from Dallas to Cambridge](https://www.expedia.ca/lp/flights/178253/8093/dallas-to-cambridge) - [Flights from Detroit to Salem](https://www.expedia.ca/lp/flights/178255/6600/detroit-to-salem) - [Flights from Madrid to Cambridge](https://www.expedia.ca/lp/flights/178281/8093/madrid-to-cambridge) - [Flights from Montreal to Boston](https://www.expedia.ca/lp/flights/178288/178239/montreal-to-boston) - [Flights from New York to Cambridge](https://www.expedia.ca/lp/flights/178293/8093/new-york-to-cambridge) - [Flights from Ottawa to Cambridge](https://www.expedia.ca/lp/flights/178296/8093/ottawa-to-cambridge) - [Flights from Phoenix to Cambridge](https://www.expedia.ca/lp/flights/178298/8093/phoenix-to-cambridge) - [Flights from Salt Lake City to Cambridge](https://www.expedia.ca/lp/flights/178302/8093/salt-lake-city-to-cambridge) - [Flights from Seattle to Salem](https://www.expedia.ca/lp/flights/178307/6600/seattle-to-salem) - [Flights from Toronto to Brookline](https://www.expedia.ca/lp/flights/178314/7091/toronto-to-brookline) - [Flights from Toronto to Cambridge](https://www.expedia.ca/lp/flights/178314/8093/toronto-to-cambridge) - [Flights from Vancouver to Cambridge](https://www.expedia.ca/lp/flights/178315/8093/vancouver-to-cambridge) - [Flights from Paris to Cambridge](https://www.expedia.ca/lp/flights/179898/8093/paris-to-cambridge) - [Flights from Barcelona to Cambridge](https://www.expedia.ca/lp/flights/179992/8093/barcelona-to-cambridge) - [Flights from Delhi to Cambridge](https://www.expedia.ca/lp/flights/180000/8093/delhi-to-cambridge) - [Flights from Milan to Cambridge](https://www.expedia.ca/lp/flights/180012/8093/milan-to-cambridge) - [Flights from Québec City to Salem](https://www.expedia.ca/lp/flights/180017/6600/quebec-city-to-salem) - [Flights from Hamilton to Cambridge](https://www.expedia.ca/lp/flights/3963/8093/hamilton-to-cambridge) - [Flights from London to Cambridge](https://www.expedia.ca/lp/flights/4127/8093/london-to-cambridge) - [Flights from Birmingham to Cambridge](https://www.expedia.ca/lp/flights/6023342/8093/birmingham-to-cambridge) - [Flights from Buffalo to Salem](https://www.expedia.ca/lp/flights/602674/6600/buffalo-to-salem) - [Flights from Buffalo to Cambridge](https://www.expedia.ca/lp/flights/602674/8093/buffalo-to-cambridge) - [Flights from Rochester to Cambridge](https://www.expedia.ca/lp/flights/602966/8093/rochester-to-cambridge) - [Flights from Edinburgh to Cambridge](https://www.expedia.ca/lp/flights/6069845/8093/edinburgh-to-cambridge) - [Flights from Phnom Penh to Cambridge](https://www.expedia.ca/lp/flights/6191801/8093/phnom-penh-to-cambridge) - [Flights from Nantucket (ACK) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/ack/pvc/nantucket-to-provincetown) - [Flights from Eureka (ACV) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/acv/pvc/eureka-to-provincetown) - [Flights from Atlantic City (ACY) to Hyannis (HYA)](https://www.expedia.ca/lp/flights/acy/hya/atlantic-city-to-hyannis) - [Flights from Albany (ALB) to Hyannis (HYA)](https://www.expedia.ca/lp/flights/alb/hya/albany-to-hyannis) - [Flights from Waterloo (ALO) to Hyannis (HYA)](https://www.expedia.ca/lp/flights/alo/hya/waterloo-to-hyannis) - [Flights from Westfield (BAF) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/baf/pvc/westfield-to-provincetown) - [Flights from Hartford (BDL) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/bdl/pvc/hartford-to-provincetown) - [Flights from Brisbane (BNE) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/bne/pvc/brisbane-to-provincetown) - [Flights from Brunswick (BQK) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/bqk/pvc/brunswick-to-provincetown) - [Flights from Buffalo (BUF) to Lawrence (LWM)](https://www.expedia.ca/lp/flights/buf/lwm/buffalo-to-lawrence) - [Flights from Belize City (BZE) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/bze/pvc/belize-city-to-provincetown) - [Flights from Paris (CDG) to Provincetown (PVC)](https://www.expedia.ca/lp/flights/cdg/pvc/paris-to-provincetown) - [Flights from Sault Ste. 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