Title: Cheap Flights to Grassy Key - Expedia.co.uk ![Oh Hello there, Hoomans. Are you coming into the water? #lifeatexpedia #LikeALocal #dolphins #floridakeys ](https://images.trvl-media.com/place/2437/83757040-1d80-4589-aea2-a5fe1bb3ba0c.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Monica Ferro ![](https://images.trvl-media.com/place/2437/83757040-1d80-4589-aea2-a5fe1bb3ba0c.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # £38 Cheap Flights to Grassy Key [View £38 flight on Sun, 1 Feb 2026](https://expedia.co.uk/Flights-Search?trip=oneway&leg1=from:MCO,to:EYW,departure:01/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:37.86&airProductToken=AQotCisIzbABEgMxNTkYzHAghLYBKNb_gwMwooCEAzhBQABYAWoCTk9yBUFOTzAwEgoIARABGAEqAk1YGAEiBAgBEAEoAigDKAQwDQ) - [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 [Grassy Key Travel Guide](https://expedia.co.uk/Grassy-Key.dx3000451823)[Hotels in Grassy Key](https://expedia.co.uk/Grassy-Key-Hotels.d3000451823.Travel-Guide-Hotels)[Things to do in Grassy Key](https://expedia.co.uk/Things-To-Do-In-Grassy-Key.d3000451823.Travel-Guide-Activities)[Grassy Key Car Hire](https://expedia.co.uk/Compare-Cheap-Car-Hire-In-Grassy-Key.d3000451823.Car-Hire-Guide)[Grassy Key Holidays](https://expedia.co.uk/Grassy-Key.d3000451823.Holidays-City-Breaks) ## Popular airlines - ![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:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&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:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&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:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Frontier Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![Spirit Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_NK.svg) Spirit Airlines [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"NK"}}]) - ![Air Canada](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AC.svg) Air Canada [](https://www.expedia.co.uk/Flights-Search?leg1=from:CMH,to:Grassy Key, Florida, United States of America,departure:29/12/2025TANYT&leg2=from:Grassy Key, Florida, United States of America,to:CMH,departure:05/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AC"}}]) - ![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 round-trip flights to Grassy Key Prices were available within the past 7 days and start at £38 for one-way flights and £76 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Breeze Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/MX.gif) Thu, 22 Jan - Thu, 29 Jan MCO Orlando EYW Key West £76 Return found 23 hours ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:MCO,to:EYW,departure:22/01/2026TANYT&leg2=from:EYW,to:MCO,departure:29/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:75.72&airProductToken=AQotCisIzbABEgMxNTkYzHAghLYBKJaPgwMw4o-DAzhBQABYAWoCTk9yBUFOTzAwCi0KKwjNsAESAzE1OBiEtgEgzHAo6t6DAzC634MDOEFAAFgBagJOT3IFQU5PMDASCggBEAEYASoCTVgYASIECAEQASgCKAMoBDAN) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Thu, 1 Jan - Fri, 2 Jan MCO Orlando MIA Miami £114 Return found 6 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:MCO,to:MIA,departure:01/01/2026TANYT&leg2=from:MIA,to:MCO,departure:02/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:113.30&airProductToken=AQozCjEIwYIBEgQxNzQxGMxwIIwCKOSjgQMwt6SBAzhCQABYAWoFQkFTSUNyCE83QVdaU0JaCjMKMQjBggESBDI5NTEYjAIgzHAo1a2BAzCfroEDOEJAAFgBagVCQVNJQ3IIUVZBSVpOQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, 3 Jul - Sat, 4 Jul MCO Orlando MIA Miami £396 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:MCO,to:MIA,departure:03/07/2026TANYT&leg2=from:MIA,to:MCO,departure:04/07/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:395.60&airProductToken=AQpuCjUIxJgBEgQxNDk0GMxwIOBcKKeskQMwiK2RAzhFQABYAWoJTUFJTkJBU0lDcghYRldOQTZCQwo1CMSYARIEMTU3ORjgXCCMAiiir5EDMJmwkQM4RUABWAFqCU1BSU5CQVNJQ3IIVEFWUUEwQlEKbgo1CMSYARIEMTA1NhiMAiDMfCiDuJEDMPS5kQM4RUAAWAFqCU1BSU5CQVNJQ3IIVkZXTkgzQlEKNQjEmAESBDI1OTMYzHwgzHAorryRAzD5vZEDOEVAAVgBaglNQUlOQkFTSUNyCFhGVlFBMEJREgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) ![Scandinavian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SK.gif) Sun, 25 Jan - Wed, 4 Feb LHR London MIA Miami £401 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:MIA,departure:25/01/2026TANYT&leg2=from:MIA,to:LHR,departure:04/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:400.55&airProductToken=AQplCjEI05YBEgM1MjYY64kBIKBsKLOvgwMwxLCDAzhMQABYAWoFTGlnaHRyCExMRVU2R0hUCjAI05YBEgM5NTcYoGwgjAIogLGDAzDntYMDOExAAVgBagVMaWdodHIITExFVTZHSFQKZgowCNOWARIDOTU4GIwCIKBsKPemhAMwp6uEAzhUQABYAWoFTGlnaHRyCFRMRVU2R0hUCjII05YBEgQxNTI3GKBsIOuJASilr4QDMMCwhAM4VEABWAFqBUxpZ2h0cghUTEVVNkdIVBIKCAEQARgBKgJTSxgBIgQIARABKAIoAygEMA8) ![TAP Portugal](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/TP.gif) Thu, 5 Feb - Wed, 11 Feb LHR London MIA Miami £433 Return just found [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:MIA,departure:05/02/2026TANYT&leg2=from:MIA,to:LHR,departure:11/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:432.25&airProductToken=AQpsCjUI1KABEgQxMzYxGOuJASCLkgEonq6EAzDDr4QDOFRAAFgBagdESVNDSU5UcghUTDBEU0k4MQozCNSgARIDMjIzGIuSASCMAijHtoQDMIa7hAM4VEAAWAFqB0RJU0NJTlRyCFRMMERTSTgxCmwKMwjUoAESAzIyNhiMAiCLkgEos_eEAzCT-4QDOFRAAFgBagdESVNDSU5UcghUTDBEU0k4MQo1CNSgARIEMTM1OBiLkgEg64kBKIX-hAMwr_-EAzhUQABYAWoHRElTQ0lOVHIIVEwwRFNJODESCggBEAEYASoCVFAYASIECAEQASgCKAMoBDAN) ## Expedia flights to Grassy Key Searching for cheap flights to Grassy Key? No travel company presents more choices than Expedia if you're looking to compare flights to Grassy Key. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Marathon. Expedia provides the cheapest flights to many destinations in Marathon and you may find even greater savings if you combine your flight with a hotel stay in Grassy Key. Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets sell out fast. Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Grassy Key for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your Grassy Key flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price. ## Frequently asked questions ### How do I find cheap flights to Grassy Key that have flexible change policies? ### Which airlines fly to Grassy Key? > - American Airlines - 5,497 flights to or near Grassy Key each month, including 5,223 flights to Miami Intl. Airport (MIA) per month. > - Delta Air Lines - 975 flights to or near Grassy Key each month, including 853 flights to Miami Intl. Airport (MIA) per month. > - Spirit Airlines - 577 flights to or near Grassy Key each month, including 577 flights to Miami Intl. Airport (MIA) per month. ### How can I find cheap tickets to Grassy Key? ### How much is a flight to Grassy Key? ### What are the most popular airports to fly into in Grassy Key? > - Miami Intl. Airport (MIA) - 7,981 flights per month. > - Key West Intl. Airport (EYW) - 624 flights per month. ### When is the cheapest time to fly to Grassy Key? ### How much is a plane ticket to Grassy Key? ### What months are the cheapest to book a flight to Grassy Key? __Flights to Grassy Key information__ | Destination airport | Miami Intl. | | ----------------------------- | ----------- | | Destination airport IATA code | MIA | | Destination city name | Miami | | Return price | £401 | ## Trending flights to Grassy Key Prices were available within the past 7 days and start at £38 for one-way flights and £76 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply. All deals One way Return ![Scandinavian Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SK.gif) Sun, 25 Jan - Wed, 4 Feb LHR London MIA Miami £401 Return found 2 days ago [](https://expedia.co.uk/Flights-Search?trip=roundtrip&leg1=from:LHR,to:MIA,departure:25/01/2026TANYT&leg2=from:MIA,to:LHR,departure:04/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:400.55&airProductToken=AQplCjEI05YBEgM1MjYY64kBIKBsKLOvgwMwxLCDAzhMQABYAWoFTGlnaHRyCExMRVU2R0hUCjAI05YBEgM5NTcYoGwgjAIogLGDAzDntYMDOExAAVgBagVMaWdodHIITExFVTZHSFQKZgowCNOWARIDOTU4GIwCIKBsKPemhAMwp6uEAzhUQABYAWoFTGlnaHRyCFRMRVU2R0hUCjII05YBEgQxNTI3GKBsIOuJASilr4QDMMCwhAM4VEABWAFqBUxpZ2h0cghUTEVVNkdIVBIKCAEQARgBKgJTSxgBIgQIARABKAIoAygEMA8) Explore a world of travel with Expedia - Accommodation - Flights - Packages - Cars - Holiday Homes - Other - [3 Star Hotels in Duck Key ](https://www.expedia.co.uk/3Star-Duck-Key-Hotels.s30-0-d184267.Travel-Guide-Filter-Hotels) - 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