Title: Cheap Flights from Seattle to Key West (SEA to EYW) - Expedia.co.uk ![](https://images.trvl-media.com/place/1187/a7c3fad3-5f12-4d91-8996-ed0e1b61b0a3.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/1187/a7c3fad3-5f12-4d91-8996-ed0e1b61b0a3.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Seattle (SEA) to Key West (EYW) - [Return](?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-Tacoma International Airport (SEA) to Key West Intl. Airport (EYW) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:sea,to:eyw,departure:14/11/2025TANYT&leg2=from:eyw,to:sea,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.co.uk/Flights-Search?leg1=from:sea,to:eyw,departure:14/11/2025TANYT&leg2=from:eyw,to:sea,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.co.uk/Flights-Search?leg1=from:sea,to:eyw,departure:14/11/2025TANYT&leg2=from:eyw,to:sea,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:sea,to:eyw,departure:14/11/2025TANYT&leg2=from:eyw,to:sea,departure:21/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) ![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 25% 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.co.uk/login) ## Cheap Flights from Seattle (SEA) to Key West (EYW) Prices were available within the past 7 days and start at for one-way flights and £1,428 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, 4 Apr - Sat, 11 Apr SEA Seattle EYW Key West £1,428 Return found 5 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:SEA,to:EYW,departure:04/04/2026TANYT&leg2=from:EYW,to:SEA,departure:11/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:1427.60&airProductToken=AQpgCi0IwaYBEgMzNzEYkgEg71kon8CJAzDTwokDOFNAAFgBagJQTXIIU1ZBSFpOTTEKLwjBpgESBDQyNTUY71kghLYBKITEiQMwy8WJAzhTQAFYAWoCUE1yCFNWQUhaTk0xClYKKwjBpgESBDQ0ODgYhLYBIEMo5oiKAzCQiooDOEJAAFgBagJQTXIFWUEyQUEKJwjBpgESATMYQyCSASjqi4oDMNSOigM4WUABWAFqAlBNcgVZQTJBQRIKCAEQARgBKgJBUxgBIgQIARABKAIoAygEMAE) ## Find the cheapest month to fly from Seattle (SEA) to Key West (EYW) ### January is typically the cheapest month to fly From £207 - £535 per traveller. ## Frequently asked questions ### How much is a flight from SEA to Key West Intl. Airport? > Round-trip journeys between Seattle - Tacoma Intl. Airport (SEA) and Key West Intl. Airport (EYW) start from £1,428. This is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP so you don't miss out. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from SEA to Key West Intl. Airport? > This can differ between air carriers, as each one has its own terms and conditions. Visit the [Customer Service Portal](https://www.expedia.co.uk/service/?langid=1033), where there are easy instructions on how to cancel your flight online. ### How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to EYW that have flexible change policies? > Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Sea-Tac Airport to EYW flights, you'll see a "no change fees" filter for you to select. ### How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)? > You'll have 4,400 kilometres to cover on the long-haul SeaTac to Key West route. Wear comfortable clothes and consider taking a neck pillow with you. ### Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Key West Intl. Airport (EYW)? > If you want to fly straight from SEA to EYW, you'll need to book a flight with one or more stops. Unfortunately, there aren't any airlines that fly directly between these airports. ### Are Sea-Tac Airport to EYW flight tickets cheaper when they're purchased at the last minute? > Last-minute bookings from SEA to Key West Intl. Airport (EYW) can be hit-or-miss. You may be able to score a bargain, but you could also miss out completely! If you'd rather play it safe and start your trip planning early, Expedia compares flight deals up to 12 months in advance. Just remember that not all airlines advertise their prices that far in advance. Our suggestion? Check back often as updates are made regularly. ## Travel information | Origin airport | Seattle - Tacoma Intl. | | --- | --- | | Destination airport | Key West Intl. | | Return price | £1,428 | | Distance | 4347 km | ## Book with confidence ### Compare flights from Seattle to Key West easily and book with confidence For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Key West. Operating between them flights per day, 1 airlines cover the route. And fly direct, getting you to Key West Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Key West Intl..   To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights.  Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to Key West Intl. (EYW) The easiest way to view the best deals on flights from Seattle to Key West today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to Key West Intl. start at just £1,428 and range up to £1,428.   To find an even better deal, try   - being flexible on your dates – midweek flights can be cheaper - looking for other airports near Seattle and Key West - booking your flight during April, the cheapest month on this route - varying your flight times – early morning and late at night are sometimes cheaper  Why you should book your Seattle to Key West flight with Expedia! We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Key West Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.   Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. 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