Title: Cheap Car Hire in Grassy Key, USA - Expedia.co.uk [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)[Flights to Grassy Key](https://expedia.co.uk/Cheap-Flights-To-Grassy-Key.d3000451823.Travel-Guide-Flights)[Things to do in Grassy Key](https://expedia.co.uk/Things-To-Do-In-Grassy-Key.d3000451823.Travel-Guide-Activities)[Grassy Key Holidays](https://expedia.co.uk/Grassy-Key.d3000451823.Holidays-City-Breaks) ![](https://images.trvl-media.com/place/2437/83757040-1d80-4589-aea2-a5fe1bb3ba0c.jpg?impolicy=fcrop&w=1200&h=300&q=medium) # Car Rentals in Grassy Key, USA ## Search and Compare from Car Companies in Grassy Key Photo by Monica Ferro ## Featured car rental suppliers Compare from agencies ![car supplier logos](https://forever.travel-assets.com/flex/flexmanager/images/2022/05/16/BEXUK-car-suppliers-logo-desktop.jpg) - ![protection illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__protection.svg) ### Change your mind Penalty-free cancellation on many/select car hire - ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Treat yourself One Key members save 10% or more on over 1 million car hire [Learn about One Key](https://www.expedia.co.uk/welcome-one-key) - ![package illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__package.svg) ### Shop smart Compare car suppliers and package your flight, hotel, and car to save ## Top Rental Car Deals in Grassy Key \* Price found within the past 6 days. Click for updated prices. Sat, 21 Mar - Sun, 22 Mar ### Midsize Toyota Corolla or similar - 5 people - Unlimited mileage ![Dollar](//mediaim.expedia.com/cars/logos/ZR.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Toyota Corolla](//mediaim.expedia.com/cars/43/66993783-7008-48ae-be5b-e0280e3a6f76.jpg) #### £40 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=40.46&cvrfrr=ZR&ctrfrr=IC&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22midsize%22]) Sat, 21 Mar - Sun, 22 Mar ### Full Size Chevrolet Malibu or similar - 5 people - Unlimited mileage ![Dollar](//mediaim.expedia.com/cars/logos/ZR.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Chevrolet Malibu](//mediaim.expedia.com/cars/43/b49ce8d5-44b1-4182-803e-eef770b10bb8.jpg) #### £43 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=43.46&cvrfrr=ZR&ctrfrr=FC&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22fullsize%22]) Sat, 21 Mar - Sun, 22 Mar ### Special Managers EV-Special or similar - 4 people - Unlimited mileage ![Dollar](//mediaim.expedia.com/cars/logos/ZR.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Managers EV-Special](//mediaim.expedia.com/cars/43/aff273ad-1da7-4455-b680-e3518b380cc6.jpg) #### £47 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=47.17&cvrfrr=ZR&ctrfrr=XX&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22other%22]) Sat, 21 Mar - Sun, 22 Mar ### Compact SUV Chevrolet Trax or similar - 5 people - Unlimited mileage ![Dollar](//mediaim.expedia.com/cars/logos/ZR.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Chevrolet Trax](//mediaim.expedia.com/cars/43/f98ef5dd-f3a4-4f40-b00e-2ca29b49b4f1.jpg) #### £47 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=47.02&cvrfrr=ZR&ctrfrr=CF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Sat, 21 Mar - Sun, 22 Mar ### Midsize Elite Polestar 2 or similar - 5 people - Unlimited mileage ![Thrifty](//mediaim.expedia.com/cars/logos/ZT.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Polestar 2](//mediaim.expedia.com/cars/45/e4397684-d422-4a9d-9618-3a6d9f783c36.jpg) #### £47 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=47.17&cvrfrr=ZT&ctrfrr=JD&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22midsize%22]) Sat, 21 Mar - Sun, 22 Mar ### Economy Chevrolet Spark or similar - 4 people - Unlimited mileage ![Thrifty](//mediaim.expedia.com/cars/logos/ZT.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Chevrolet Spark](//mediaim.expedia.com/cars/45/72c58f0a-a81a-48e3-befa-2ee0943c5166.jpg) #### £50 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=49.84&cvrfrr=ZT&ctrfrr=EC&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22economy%22]) Sat, 21 Mar - Sun, 22 Mar ### Standard SUV Chevrolet Equinox or similar - 5 people - Unlimited mileage ![Dollar](//mediaim.expedia.com/cars/logos/ZR.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Chevrolet Equinox](//mediaim.expedia.com/cars/43/74c137a5-0640-4afb-8144-8dae3b5d0698.jpg) #### £50 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=21/03/2026&date2=22/03/2026&pprfrr=null&tprfrr=50.41&cvrfrr=ZR&ctrfrr=SF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Thu, 19 Mar - Fri, 20 Mar ### Full Size Elite Pickup Regular Cab Ram 2500 Crew or similar - 5 people - Unlimited mileage ![Thrifty](//mediaim.expedia.com/cars/logos/ZT.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Ram 2500 Crew](//mediaim.expedia.com/cars/45/b3514c8b-f726-43d3-99fe-35c382ed1003.jpg) #### £54 total found 1 day ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=19/03/2026&date2=20/03/2026&pprfrr=null&tprfrr=54.27&cvrfrr=ZT&ctrfrr=GP&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22pickup%22]) Tue, 17 Mar - Wed, 18 Mar ### Mini Van Chrysler Pacifica or similar - 7 people - Unlimited mileage ![Thrifty](//mediaim.expedia.com/cars/logos/ZT.png) #### Pick-up location 3900 Northwest 25th Street, Suite 405, Miami, Florida 33142, USA 83.46 mi from Grassy Key city centre ![Chrysler Pacifica](//mediaim.expedia.com/cars/45/465d9c89-1a3c-4baf-a83e-3d676fee5fdd.jpg) #### £66 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.796980&olon=-80.261980&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=66.05&cvrfrr=ZT&ctrfrr=MV&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22minivan%22]) Tue, 17 Mar - Wed, 18 Mar ### Premium Crossover Dodge Durango or similar - 7 people - Unlimited mileage ![Alamo](//mediaim.expedia.com/cars/logos/AL.png) #### Pick-up location 3900 Nw 25th St Ste 400, Miami, Florida 33142, USA 83.51 mi from Grassy Key city centre ![Dodge Durango](//mediaim.expedia.com/cars/6/ba3f93f3-1777-4f34-95e7-0865b5ab9b2b.jpg) #### £71 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.797000&olon=-80.260300&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=70.71&cvrfrr=AL&ctrfrr=PG&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Tue, 17 Mar - Wed, 18 Mar ### Luxury SUV Jeep Grand Wagoneer or similar - 7 people - Unlimited mileage ![Hertz](//mediaim.expedia.com/cars/logos/ZE.png) #### Pick-up location 3900 Nw 25th Street Suite 410, Miami, Florida 33142, USA 83.6 mi from Grassy Key city centre ![Jeep Grand Wagoneer](//mediaim.expedia.com/cars/40/333197b1-a5fe-43c1-b4aa-c9f3ee4566c7.jpg) #### £78 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.798598&olon=-80.260607&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=78.29&cvrfrr=ZE&ctrfrr=LF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Tue, 17 Mar - Wed, 18 Mar ### Standard Elite SUV Audi Q3 Cadillac XT4 or similar - 5 people - Unlimited mileage ![Alamo](//mediaim.expedia.com/cars/logos/AL.png) #### Pick-up location 3900 Nw 25th St Ste 400, Miami, Florida 33142, USA 83.51 mi from Grassy Key city centre ![Audi Q3 Cadillac XT4](//mediaim.expedia.com/cars/6/251d3717-fc5b-45df-8e7d-ff25f9b604cb.jpg) #### £81 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.797000&olon=-80.260300&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=81.07&cvrfrr=AL&ctrfrr=RF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Tue, 17 Mar - Wed, 18 Mar ### Compact Elite Crossover Volvo XC40 Hybrid - PRESTIGE or similar - 5 people - Unlimited mileage ![Hertz](//mediaim.expedia.com/cars/logos/ZE.png) #### Pick-up location 3900 Nw 25th Street Suite 410, Miami, Florida 33142, USA 83.6 mi from Grassy Key city centre ![Volvo XC40 Hybrid - PRESTIGE](//mediaim.expedia.com/cars/40/20e325d1-0930-47c8-b4e8-f82c34e3e79e.jpg) #### £90 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.798598&olon=-80.260607&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=89.64&cvrfrr=ZE&ctrfrr=DG&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Tue, 17 Mar - Wed, 18 Mar ### Premium Elite SUV Audi Q5 or similar - 5 people - Unlimited mileage ![Alamo](//mediaim.expedia.com/cars/logos/AL.png) #### Pick-up location 3900 Nw 25th St Ste 400, Miami, Florida 33142, USA 83.51 mi from Grassy Key city centre ![Audi Q5](//mediaim.expedia.com/cars/6/658a9a7e-ff8a-4887-b1d5-b9226b351acc.jpg) #### £116 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.797000&olon=-80.260300&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=115.94&cvrfrr=AL&ctrfrr=UF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Tue, 17 Mar - Wed, 18 Mar ### Luxury Elite SUV BMW X7 Range Rover Sport or similar - 5 people - Unlimited mileage ![Alamo](//mediaim.expedia.com/cars/logos/AL.png) #### Pick-up location 3900 Nw 25th St Ste 400, Miami, Florida 33142, USA 83.51 mi from Grassy Key city centre ![BMW X7 Range Rover Sport](//mediaim.expedia.com/cars/6/a08590a8-80da-4bdf-b4b8-2911a8adbb81.jpg) #### £121 total found 16 hours ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.797000&olon=-80.260300&date1=17/03/2026&date2=18/03/2026&pprfrr=null&tprfrr=120.93&cvrfrr=AL&ctrfrr=WF&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22suv%22]) Sat, 21 Mar - Sun, 22 Mar ### Economy Elite MINI COOPER or similar - 4 people - Unlimited mileage ![Sixt](//mediaim.expedia.com/cars/logos/SX.png) #### Pick-up location 3900 Nw 25th Street Suite 414, Miami, Florida 33142, USA 82.59 mi from Grassy Key city centre ![MINI COOPER](//mediaim.expedia.com/cars/35/69aeec26-9cf1-4d1f-a649-4d1cfaec824d.jpg) #### £125 total found 4 days ago [](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&olat=25.795880&olon=-80.287100&date1=21/03/2026&date2=22/03/2026&pprfrr=116.44&tprfrr=124.59&cvrfrr=SX&ctrfrr=HC&crfrr=pricefeedResponseFlex&SearchType=Place&selCC=[%22economy%22]) ### Don't see what you're looking for? See all car hire in Grassy Key [View all cars](https://expedia.co.uk/carsearch?paandi=true&fdrp=1&styp=2&dagv=1&subm=1&locn=Grassy%20Key,%20Florida,%20United%20States%20of%20America&dpln=3000451823&date1=22/03/2026&date2=24/03/2026&crfrr=defaultFlex&SearchType=Place) Lowest prices found within the past 4 days. Prices and availability subject to change. Additional terms may apply. ![](https://forever.travel-assets.com/flex/flexmanager/images/2026/02/06/expedia-sale-2026-desktop-uk-fr-de.jpg?impolicy=fcrop&w=1400&h=600&q=mediumHigh) ## The Annual Holiday Sale Members save up to 40% on hotels and holiday homes. Plan this year’s big trip and save. [Book now](https://expedia.co.uk/cheap-deals?rfrr=CTG_SPRING_PROMO_3000451823) ## Frequently asked questions ### Can I hire a car from Marathon, FL (MTH-Florida Keys Marathon)? ### What happens if I need to cancel my Grassy Key car reservation? ### What types of cars can I rent in Grassy Key? ### Why should I rent a Grassy Key car with Expedia? ### How do I find the best car hire deals in Grassy Key with Expedia? ### How old do you have to be to rent a car in Grassy Key? ### What do you need to rent a car in Grassy Key? ### Can I hire a car for a month or longer in Grassy Key? ### Where can I find a Grassy Key hire car if I am younger than 25? ## Car Hire Information | Popular car types: | [SUV](https://www.expedia.co.uk/lp/b/car-rental/suv?rfrr=car.table.SUV), [Full Size](https://www.expedia.co.uk/lp/b/car-rental/fullsize?rfrr=car.table.FullSize), [Economy](https://www.expedia.co.uk/lp/b/car-rental/economy?rfrr=car.table.Economy) | | -------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Car suppliers available: | | | Our best deal of the day: | £40 | | Our second best deal of the day: | £43 | | Our third best deal of the day: | £47 | | From the airport to your hotel: | [Airport Transportation](https://www.expedia.co.uk/ground-transfers?rfrr=car.table.AirportTransportation) | ## Explore a world of travel with Expedia - 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