Grassy Key Car Rental

Search and Compare from Car Companies in Grassy Key

I have a discount code

Featured car rental suppliers

Compare from agencies

car supplier logos

Compare car suppliers to unlock big savings, and package your flight, hotel, and car to save even more.

Members save 10% more on select hotels, cars, activities and vacation rentals. Sign up.Opens in a new window

Enjoy maximum flexibility with penalty-free cancellation on most car rentals.

Top Car Deals in Grassy Key

* Price found within the past 6 days. Click for updated prices.

Sat, Aug 23 to Sun, Aug 24

Economy

Chevrolet Spark or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Chevrolet Spark

CA $3

total
found 3 days ago
Economy Chevrolet Spark
Sat, Aug 23 to Sun, Aug 24

Midsize

Nissan Sentra or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Nissan Sentra

CA $3

total
found 3 days ago
Midsize Nissan Sentra
Sat, Aug 23 to Sun, Aug 24

Compact

Hyundai Accent or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Hyundai Accent

CA $3

total
found 3 days ago
Compact Hyundai Accent
Sat, Aug 23 to Sun, Aug 24

Full Size

Hyundai Sonata or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Hyundai Sonata

CA $7

total
found 3 days ago
Full Size Hyundai Sonata
Sat, Aug 23 to Sun, Aug 24

Special

Dealers Choice or similar
  • 4 people
  • Unlimited mileage
Miami, Florida, USA
Dealers Choice

CA $46

total
found 3 days ago
Special Dealers Choice
Sat, Aug 23 to Sun, Aug 24

Standard Elite Special

Ford Mustang Mach-E or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Ford Mustang Mach-E

CA $54

total
found 3 days ago
Standard Elite Special Ford Mustang Mach-E
Sat, Aug 23 to Sun, Aug 24

Premium

Toyota Crown or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Toyota Crown

CA $83

total
found 3 days ago
Premium Toyota Crown
Sat, Aug 23 to Sun, Aug 24

Mini Van

Chrysler Voyager or similar
  • 7 people
  • Unlimited mileage
Miami, Florida, USA
Chrysler Voyager

CA $85

total
found 3 days ago
Mini Van Chrysler Voyager
Sat, Aug 23 to Sun, Aug 24

Midsize Elite Special

Tesla Model 3 or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Tesla Model 3

CA $105

total
found 3 days ago
Midsize Elite Special Tesla Model 3
Sat, Aug 23 to Sun, Aug 24

Luxury

Genesis G70 or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Genesis G70

CA $113

total
found 3 days ago
Luxury Genesis G70
Sat, Aug 23 to Sun, Aug 24

Premium Elite

Mercedes GLE BMW X5 or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Mercedes GLE BMW X5

CA $143

total
found 3 days ago
Premium Elite Mercedes GLE BMW X5
Sat, Aug 23 to Sun, Aug 24

Oversize SUV

Lincoln Navigator L Jeep Grand Wagoneer L or similar
  • 7 people
  • Unlimited mileage
Miami, Florida, USA
Lincoln Navigator L Jeep Grand Wagoneer L

CA $195

total
found 3 days ago
Oversize SUV Lincoln Navigator L Jeep Grand Wagoneer L
Sat, Aug 23 to Sun, Aug 24

Full Size Elite Special

Audi A5 Sportback or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Audi A5 Sportback

CA $211

total
found 3 days ago
Full Size Elite Special Audi A5 Sportback
Sat, Aug 23 to Sun, Aug 24

Luxury Elite

Genesis G80E or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Genesis G80E

CA $230

total
found 3 days ago
Luxury Elite Genesis G80E

Don't see what you're looking for?

See all car rentals in Grassy Key
View all cars
Lowest prices found within the past 3 days. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

Can I rent a car from Marathon, FL (MTH-Florida Keys Marathon)?
With Budget and Avis within a quick commute of Marathon, FL (MTH-Florida Keys Marathon), getting off the plane and out onto the road is quick and easy.
What happens if I need to cancel my Grassy Key car reservation?
No need to stress. You should receive a complete refund if you let us know at least six hours before picking up the car. Your confirmation contains details about this, and so does our Customer Service Portal. Not all prepaid reservations will receive a refund though, so it's a good idea to go over your car's cancellation policy.
How do I find the best car rental deals in Grassy Key with Expedia?
Expedia makes it quick and easy to compare costs, offers and rental companies, and to check customer ratings. Combine your Grassy Key car rental with flight or hotel bookings to make even bigger savings.
How old do you have to be to rent a car in Grassy Key?
In Grassy Key, the requirement is 21 years and over. Most outlets will charge additional fees for young drivers, which can vary based on the rental location. Rental policies for young drivers may include restrictions for certain vehicles, such as luxury cars, and require inclusive insurance to be taken out. It's a good idea to check the fine print before booking your wheels.
What do you need to rent a car in Grassy Key?
Two things — a valid driver's license and a credit card in the same name. Most car rental companies will offer you insurance, which is optional. But you may have to provide proof of other coverage if you opt out. Be sure to check with your rental provider to avoid any issues.
Can I rent a car for a month or longer in Grassy Key?
Expedia makes it a breeze to book a cheap long-term rental in Grassy Key. Simply click on our long-term car rental deals page, enter your preferences and compare your possibilities.
Where can I find a Grassy Key car rental if I am younger than 25?
Age policies differ between rental companies, so you'll have to do a bit of research. Managed to find a Grassy Key supplier that does rent to drivers under 25? Terrific! Just take note that extra fees often apply to drivers aged between 21 and 24. The terms and conditions of each rental car you're interested in should have all the information you need.

Car Rental Information

Popular car types:
SUV, Full Size, Economy
Car suppliers available:
Our best deal of the day:
CA $3
Our second best deal of the day:
CA $7
Our third best deal of the day:
CA $46
From the airport to your hotel:
Airport Transportation