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:29/09/2025TANYT&leg2=from:eyw,to:sea,departure:06/10/2025TANYT&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:29/09/2025TANYT&leg2=from:eyw,to:sea,departure:06/10/2025TANYT&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:29/09/2025TANYT&leg2=from:eyw,to:sea,departure:06/10/2025TANYT&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:29/09/2025TANYT&leg2=from:eyw,to:sea,departure:06/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ## Plan, book, fly with confidence - ### Be in the know Get alerts if flight prices drop or rise\* - ### Book smarter Save up to 25% on select hotels after you book a flight\* - ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.co.uk/login) ## Find the cheapest month to fly from Seattle (SEA) to Key West (EYW) ### January is typically the cheapest month to fly From £206 - £532 per traveller. Flight from Seattle to Key West route information | Origin airport | Seattle - Tacoma Intl. | | --- | --- | | Destination airport | Key West Intl. | | Distance | 4347 km | ## 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, 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 and range up to .   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 , 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. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.   ## 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 . 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. ## Explore a world of travel with Expedia - Trending Routes - Trending Flights - Top Flights Destinations - Related Airlines - Cheap Flights from Other Airports - Expedia's Latest Trends ### Top Routes from Seattle - [Seattle to Bologna (SEA - BLQ)](https://expedia.co.uk/lp/flights/sea/blq/seattle-to-bologna) - [Seattle to Barcelona (SEA - BCN)](https://expedia.co.uk/lp/flights/sea/bcn/seattle-to-barcelona) - [Seattle to Florence (SEA - FLR)](https://expedia.co.uk/lp/flights/sea/flr/seattle-to-florence) - [Seattle to Reykjavik (SEA - KEF)](https://expedia.co.uk/lp/flights/sea/kef/seattle-to-reykjavik) - [Seattle to Nice (SEA - NCE)](https://expedia.co.uk/lp/flights/sea/nce/seattle-to-nice) - [Seattle to Athens (SEA - ATH)](https://expedia.co.uk/lp/flights/sea/ath/seattle-to-athens) - [Seattle to London (SEA - LHR)](https://expedia.co.uk/lp/flights/sea/lhr/seattle-to-london) - [Seattle to Lisbon (SEA - LIS)](https://expedia.co.uk/lp/flights/sea/lis/seattle-to-lisbon) ### Top Routes to Key West - [London to Key West (LCY - EYW)](https://expedia.co.uk/lp/flights/lcy/eyw/london-to-key-west) - [Miami to Key West (MIA - EYW)](https://expedia.co.uk/lp/flights/mia/eyw/miami-to-key-west) - [Edinburgh to Key West (EDI - EYW)](https://expedia.co.uk/lp/flights/edi/eyw/edinburgh-to-key-west) - [New York to Key West (JFK - EYW)](https://expedia.co.uk/lp/flights/jfk/eyw/new-york-to-key-west) - [Dublin to Key West (DUB - EYW)](https://expedia.co.uk/lp/flights/dub/eyw/dublin-to-key-west) - [Birmingham to Key West (BHX - EYW)](https://expedia.co.uk/lp/flights/bhx/eyw/birmingham-to-key-west) - [London to Key West (LHR - EYW)](https://expedia.co.uk/lp/flights/lhr/eyw/london-to-key-west) - [Orlando to Key West (MCO - EYW)](https://expedia.co.uk/lp/flights/mco/eyw/orlando-to-key-west) - [Pittsburgh to Key West (PIT - EYW)](https://expedia.co.uk/lp/flights/pit/eyw/pittsburgh-to-key-west) - [Manchester to Key West (MAN - EYW)](https://expedia.co.uk/lp/flights/man/eyw/manchester-to-key-west) - [London to Key West (LGW - EYW)](https://expedia.co.uk/lp/flights/lgw/eyw/london-to-key-west) - [Belfast to Key West (BHD - EYW)](https://expedia.co.uk/lp/flights/bhd/eyw/belfast-to-key-west) ### Top Routes from Seattle - [Virgin Atlantic Seattle to London](https://expedia.co.uk/lp/flight-routes/virgin-atlantic-from-seattle-tacoma-intl-to-heathrow/vs/sea/lhr) ### Top Routes to Key West - [American Airlines New York to Key West](https://expedia.co.uk/lp/flight-routes/american-airlines-from-john-f-kennedy-intl-to-key-west-intl/aa/jfk/eyw) ### Top Flight Destinations - [Flights to Las Vegas](https://expedia.co.uk/Cheap-Flights-To-Las-Vegas.d178276.Travel-Guide-Flights) - [Flights to New York](https://expedia.co.uk/Cheap-Flights-To-New-York.d178293.Travel-Guide-Flights) - [Flights to Orlando](https://expedia.co.uk/Cheap-Flights-To-Orlando.d178294.Travel-Guide-Flights) - [Flights to Chicago](https://expedia.co.uk/Cheap-Flights-To-Chicago.d178248.Travel-Guide-Flights) - [Flights to San Diego](https://expedia.co.uk/Cheap-Flights-To-San-Diego.d3073.Travel-Guide-Flights) - [Flights to San Francisco](https://expedia.co.uk/Cheap-Flights-To-San-Francisco.d178305.Travel-Guide-Flights) - [Flights to Los Angeles](https://expedia.co.uk/Cheap-Flights-To-Los-Angeles.d178280.Travel-Guide-Flights) - [Flights to Boston](https://expedia.co.uk/Cheap-Flights-To-Boston.d178239.Travel-Guide-Flights) - [Flights to Miami](https://expedia.co.uk/Cheap-Flights-To-Miami.d178286.Travel-Guide-Flights) - [Flights to Houston](https://expedia.co.uk/Cheap-Flights-To-Houston.d178265.Travel-Guide-Flights) - [Flights to Pigeon Forge](https://expedia.co.uk/Cheap-Flights-To-Pigeon-Forge.d8264.Travel-Guide-Flights) - [Flights to Nashville](https://expedia.co.uk/Cheap-Flights-To-Nashville.d178291.Travel-Guide-Flights) - [Flights to Myrtle Beach](https://expedia.co.uk/Cheap-Flights-To-Myrtle-Beach.d601685.Travel-Guide-Flights) - [Flights to Atlanta](https://expedia.co.uk/Cheap-Flights-To-Atlanta.d178232.Travel-Guide-Flights) - [Flights to San Antonio](https://expedia.co.uk/Cheap-Flights-To-San-Antonio.d178303.Travel-Guide-Flights) - [Flights to Denver](https://expedia.co.uk/Cheap-Flights-To-Denver.d178254.Travel-Guide-Flights) - [Flights to Honolulu](https://expedia.co.uk/Cheap-Flights-To-Honolulu.d1488.Travel-Guide-Flights) - [Flights to Gatlinburg](https://expedia.co.uk/Cheap-Flights-To-Gatlinburg.d7474.Travel-Guide-Flights) - [Flights to Panama City Beach](https://expedia.co.uk/Cheap-Flights-To-Panama-City-Beach.d8021.Travel-Guide-Flights) - [Flights to Atlantic City](https://expedia.co.uk/Cheap-Flights-To-Atlantic-City.d602179.Travel-Guide-Flights) ### Related Airlines - [KLM](https://expedia.co.uk/KLM-Flights.cKL.Travel-Guide-Airlines) - [British Airways](https://expedia.co.uk/British-Airways-Flights.cBA.Travel-Guide-Airlines) - [Air France](https://expedia.co.uk/Air-France-Flights.cAF.Travel-Guide-Airlines) - [Air Canada](https://expedia.co.uk/Air-Canada-Flights.cAC.Travel-Guide-Airlines) - [Lufthansa](https://expedia.co.uk/Lufthansa-Flights.cLH.Travel-Guide-Airlines) - [Icelandair](https://expedia.co.uk/Icelandair-Flights.cFI.Travel-Guide-Airlines) - [Aer Lingus](https://expedia.co.uk/Aer-Lingus-Flights.cEI.Travel-Guide-Airlines) - [Iberia](https://expedia.co.uk/Iberia-Flights.cIB.Travel-Guide-Airlines) - [Turkish Airlines](https://expedia.co.uk/Turkish-Airlines-Flights.cTK.Travel-Guide-Airlines) - [Virgin Atlantic](https://expedia.co.uk/Virgin-Atlantic-Flights.cVS.Travel-Guide-Airlines) - [Finnair](https://expedia.co.uk/Finnair-Flights.cAY.Travel-Guide-Airlines) - [Brussels Airlines](https://expedia.co.uk/Brussels-Airlines-Flights.cSN.Travel-Guide-Airlines) - [Alaska Airlines](https://expedia.co.uk/Alaska-Airlines-Flights.cAS.Travel-Guide-Airlines) - [Austrian Airlines](https://expedia.co.uk/Austrian-Airlines-Flights.cOS.Travel-Guide-Airlines) - [Swiss International Air Lines](https://expedia.co.uk/Swiss-International-Air-Lines-Flights.cLX.Travel-Guide-Airlines) - [SAS](https://expedia.co.uk/Scandinavian-Airlines-Flights.cSK.Travel-Guide-Airlines) ### Nearby Airports - [Boeing Field Airport (BFI)](https://expedia.co.uk/lp/airports/bfi/flights-from-boeing-field-airport) - [Seattle Paine Field Intl. Airport Airport (PAE)](https://expedia.co.uk/lp/airports/pae/flights-from-seattle-paine-field-intl-airport-airport) - [William R. Fairchild Intl. Airport (CLM)](https://expedia.co.uk/lp/airports/clm/flights-from-william-r-fairchild-intl-airport) - [Lopez Island Airport (LPS)](https://expedia.co.uk/lp/airports/lps/flights-from-lopez-island-airport) - [Bowerman Airport (HQM)](https://expedia.co.uk/lp/airports/hqm/flights-from-bowerman-airport) - [Westsound Airport (WSX)](https://expedia.co.uk/lp/airports/wsx/flights-from-westsound-airport) - [Bellingham Intl. Airport (BLI)](https://expedia.co.uk/lp/airports/bli/flights-from-bellingham-intl-airport) - [Pangborn Memorial Airport (EAT)](https://expedia.co.uk/lp/airports/eat/flights-from-pangborn-memorial-airport) ### Expedia's Latest Trends Flights - [LHR to BOS flights](https://expedia.co.uk/lp/flights/lhr/bos/london-to-boston) - [DUB to MCO flights](https://expedia.co.uk/lp/flights/dub/mco/dublin-to-orlando) - [LHR to MCO flights](https://expedia.co.uk/lp/flights/lhr/mco/london-to-orlando) - [LHR to CVG flights](https://expedia.co.uk/lp/flights/lhr/cvg/london-to-cincinnati) - [LHR to SEA flights](https://expedia.co.uk/lp/flights/lhr/sea/london-to-seattle) - [MIA to MCO flights](https://expedia.co.uk/lp/flights/mia/mco/miami-to-orlando) - [LHR to PHL flights](https://expedia.co.uk/lp/flights/lhr/phl/london-to-philadelphia) - [LGW to MCO flights](https://expedia.co.uk/lp/flights/lgw/mco/london-to-orlando) - [MAN to BOS flights](https://expedia.co.uk/lp/flights/man/bos/manchester-to-boston) - [LAS to LAX flights](https://expedia.co.uk/lp/flights/las/lax/las-vegas-to-los-angeles) - [LHR to FLL flights](https://expedia.co.uk/lp/flights/lhr/fll/london-to-fort-lauderdale) - [MAN to MCO flights](https://expedia.co.uk/lp/flights/man/mco/manchester-to-orlando) - [LON to NYC flights](https://expedia.co.uk/lp/flights/lon/nyc/london-to-new-york) - [LAS to SFO flights](https://expedia.co.uk/lp/flights/las/sfo/las-vegas-to-san-francisco) - [LHR to MIA flights](https://expedia.co.uk/lp/flights/lhr/mia/london-to-miami) - [LGW to TPA flights](https://expedia.co.uk/lp/flights/lgw/tpa/london-to-tampa) - [EDI to BOS flights](https://expedia.co.uk/lp/flights/edi/bos/edinburgh-to-boston) - [MAN to LAS flights](https://expedia.co.uk/lp/flights/man/las/manchester-to-las-vegas) - [LAX to LAS flights](https://expedia.co.uk/lp/flights/lax/las/los-angeles-to-las-vegas) - [GLA to MCO flights](https://expedia.co.uk/lp/flights/gla/mco/glasgow-to-orlando) - [MAN to MIA flights](https://expedia.co.uk/lp/flights/man/mia/manchester-to-miami) - [SFO to LAS flights](https://expedia.co.uk/lp/flights/sfo/las/san-francisco-to-las-vegas) - [LHR to SAN flights](https://expedia.co.uk/lp/flights/lhr/san/london-to-san-diego) - [DUB to LAS flights](https://expedia.co.uk/lp/flights/dub/las/dublin-to-las-vegas) - [JFK to MCO flights](https://expedia.co.uk/lp/flights/jfk/mco/new-york-to-orlando) - [LHR to LAS flights](https://expedia.co.uk/lp/flights/lhr/las/london-to-las-vegas) - [BOS to JFK flights](https://expedia.co.uk/lp/flights/bos/jfk/boston-to-new-york) - [MIA to LHR flights](https://expedia.co.uk/lp/flights/mia/lhr/miami-to-london) - [EDI to MCO flights](https://expedia.co.uk/lp/flights/edi/mco/edinburgh-to-orlando) - [LHR to DFW flights](https://expedia.co.uk/lp/flights/lhr/dfw/london-to-dallas) \*Available to Expedia members. ![](https://a.travel-assets.com/mad-service/footer/bnaBanners/BEX_Footer.jpg) ## Go further with the Expedia app Save on select hotels when you book in the app. Our app deals help you to save on trips so you can travel more and manage it all on the go. Scan the QR code with your device camera and download our app ![QR code to download the app](https://a.travel-assets.com/mad-service/qr-code/footer_qr/3_QR_FOOTER.png)