Grassy Key Car Rental

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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.

Fri., Aug. 15 to Sat., Aug. 16

Economy

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

CA $3

total
found 6 hours ago
Economy Chevrolet Spark
Fri., Aug. 15 to Sat., Aug. 16

Midsize

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

CA $3

total
found 6 hours ago
Midsize Nissan Sentra
Fri., Aug. 15 to Sat., Aug. 16

Compact

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

CA $3

total
found 6 hours ago
Compact Hyundai Accent
Sun., Aug. 17 to Mon., Aug. 18

Full Size

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

CA $7

total
found 17 hours ago
Full Size Hyundai Sonata
Tue., Aug. 19 to Wed., Aug. 20

Special

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

CA $46

total
found 4 hours ago
Special Dealers Choice
Tue., Aug. 19 to Wed., Aug. 20

Premium

Dodge Charger or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Dodge Charger

CA $57

total
found 4 hours ago
Premium Dodge Charger
Tue., Aug. 19 to Wed., Aug. 20

Standard Elite Special

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

CA $77

total
found 4 hours ago
Standard Elite Special Ford Mustang Mach-E
Sun., Aug. 17 to Mon., Aug. 18

Luxury

Chrysler 300 or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Chrysler 300

CA $76

total
found 17 hours ago
Luxury Chrysler 300
Tue., Aug. 19 to Wed., Aug. 20

Midsize Elite Special

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

CA $105

total
found 4 hours ago
Midsize Elite Special Tesla Model 3
Tue., Aug. 19 to Wed., Aug. 20

Full Size Elite Special

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

CA $117

total
found 4 hours ago
Full Size Elite Special Audi A5 Sportback
Sun., Aug. 17 to Mon., Aug. 18

Premium Elite

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

CA $120

total
found 17 hours ago
Premium Elite Mercedes GLE BMW X5
Fri., Aug. 15 to Sat., Aug. 16

Compact Elite

Mercedes-benz cla-class or similar
  • 5 people
  • Unlimited mileage
Miami, Florida, USA
Mercedes-benz cla-class

CA $146

total
found 6 hours ago
Compact Elite Mercedes-benz cla-class
Tue., Aug. 19 to Wed., Aug. 20

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 $151

total
found 4 hours ago
Oversize SUV Lincoln Navigator L Jeep Grand Wagoneer L
Fri., Aug. 15 to Sat., Aug. 16

Luxury Elite

Audi Q7 Volvo XC90 or similar
  • 7 people
  • Unlimited mileage
Miami, Florida, USA
Audi Q7 Volvo XC90

CA $178

total
found 6 hours ago
Luxury Elite Audi Q7 Volvo XC90

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Lowest prices found within the past 6 hours. 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