$4 Car Rental Grassy Key, FL

These Grassy Key insights are based on real traveler data from Expedia, aggregated using AI to help you plan your trip. Updated: September 6, 2026.

Reasons to book a car rental in and around Grassy Key

Renting a car in Grassy Key provides the freedom and flexibility to explore the beautiful surroundings at your own pace. This popular choice allows for easy management of luggage and adaptable travel plans, making it ideal for families or those seeking beach and outdoor experiences. With a rental car, you can effortlessly visit nearby attractions such as Sombrero Beach, located 10 miles away, perfect for enjoying the sun and sand. Just 2 miles from Grassy Key is Curry Hammock State Park, where you can immerse yourself in nature and adventure. Little Conch Key, situated 4 miles away, offers additional beach and outdoor activities.

A rental car also simplifies trips to nearby cities like Marathon, where you'll find attractions such as the iconic Seven Mile Bridge and Vaca Key. Key Colony Beach, only 5 miles away, features both Sombrero Beach and Curry Hammock State Park, while Duck Key, 3 miles from Grassy Key, boasts more outdoor options. With a car, you can explore these destinations with ease, ensuring a fulfilling and enjoyable experience in and around Grassy Key.

Most popular car rentals around Grassy Key

• Midsize: This car type accommodates 5 travelers comfortably and can hold up to 3 large suitcases, making it an excellent choice for couples and families. The midsize option provides ample space for both passengers and luggage, ensuring a pleasant journey as you explore the attractions around Grassy Key at your own pace.
• Compact: Ideal for solo travelers, couples, or small families, the compact car also accommodates 5 passengers and up to 3 medium suitcases. Its smaller size makes it easy to navigate through tight spaces, perfect for the scenic drives around Grassy Key. Renting a compact car ensures flexibility while keeping your travel plans manageable.
• Standard SUV: The standard SUV offers a bit more room, accommodating up to 5 travelers with space for 2 medium suitcases. This option is great for couples, families, or groups who desire extra comfort and versatility. With its higher driving position and spacious interior, a standard SUV makes it easy to enjoy the beautiful surroundings of Grassy Key and beyond.

Top rated car suppliers around Grassy Key

• Budget: Budget provides a reliable option for car rentals, located just 7 miles away from Grassy Key. This supplier is known for offering competitive rates and a selection of vehicles that are ideal for travelers. The most booked cars with Budget include Midsize SUVs and Fullsize vehicles, catering well to those needing space and comfort for their adventures around the Keys.
• Enterprise: Enterprise is another excellent choice for car rental in the Grassy Key area, with a location merely 7 miles away. Renowned for its friendly service, Enterprise features a diverse fleet that includes popular options like Midsize SUVs and Standard SUVs. This supplier is a favorite among travelers who appreciate flexibility and the ability to manage their travel plans on the go.
• Avis: Avis also stands out as a top car rental supplier, conveniently located 7 miles from Grassy Key. This company is known for its quality vehicles, with a strong emphasis on customer satisfaction. Midsize SUVs and Fullsize cars are among the most requested options, making Avis a great choice for those looking to explore the beautiful surroundings of Grassy Key with comfort and style.

Where to stay around Grassy Key

• Marathon: Situated in Marathon, Grassy Key offers travelers a prime location for enjoying a beach, outdoor, and family experience. With attractions such as Sombrero Beach, known for its beautiful sands, and the modern Seven Mile Bridge, there are plenty of opportunities for relaxation and exploration. Visitors can also enjoy local shopping areas and a variety of food and drink options, including pubs and breweries. This area is particularly appealing during the warm months when outdoor activities are at their peak.
• Key Colony Beach: Located 5 miles from Grassy Key, Key Colony Beach is a delightful island destination perfect for beach and outdoor activities. With stunning locations like Coco Plum Beach and Curry Hammock State Park, visitors can enjoy both relaxation and adventure. The area features recreational spaces, shopping centers, and dining options, ensuring that all needs are met while soaking up the sun. This neighborhood is ideal for families seeking a fun-filled getaway.
• Tingler Island: Approximately 9 miles from Grassy Key, Tingler Island is a great spot for those looking for outdoor adventures and educational experiences. This island is known for its beautiful beaches and proximity to national state parks, making it an excellent choice for adventure seekers. Visitors can explore underwater sports opportunities and scenic landscapes, with local highlights including Sombrero Beach and Vaca Key. It’s a fantastic area for those who appreciate nature and adventure.

10 tips to save on your car rental in and around Grassy Key

1. Use filters to find the right car: Refine your search by selecting vehicle types and specific features. Whether you require an SUV for additional space, a convertible for summer drives, or an economical car for budget-friendly travel, utilize the filters on Expedia to discover the best option for your journey.
2. Book in advance to help lower costs: Rental prices can vary based on demand, so it's advisable to secure your car well in advance of your trip. By booking early, you are more likely to access lower rates and enjoy a wider selection, especially during peak travel seasons.
3. Consider a smaller car for savings: Compact cars typically come with lower rental costs and are easier to park in crowded locations. Mid-size rentals strike a good balance between affordability, comfort, and fuel efficiency.
4. Age guidelines: Drivers under 30 years old may encounter higher deposits or daily fees, and certain vehicle categories—such as SUVs or luxury models—might not be available. This can also apply to renters over 70 years old. Always verify the age restrictions before making a reservation.
5. Check fuel policies: Some rental agreements require a full-to-full fuel policy, meaning you must return the car with a full tank to avoid additional charges. This is often the most favorable option. Others may offer full-to-empty or prepaid fueling alternatives, which can be acceptable as well. Just ensure that you return the car empty in that case.
6. Save on city and airport pickups: Picking up your rental car at airports often incurs a surcharge, but the convenience may justify the extra cost.
7. Know your payment options: Most car rental companies primarily accept credit cards for payment.
8. Understand your insurance coverage: Car rental insurance can help you avoid unexpected expenses and provide peace of mind in case of unforeseen incidents during your trip. It's easy to add rental insurance when you book through Expedia.
9. Consider unlimited mileage: If you're planning lengthy road trips, seek out rentals that offer unlimited mileage to prevent extra charges.
10. Bring your driver's license and ID: A valid driver's license is required to rent a car.

Best time to rent a car in and around Grassy Key

The best time to rent a car in and around Grassy Key is September, when prices are at their lowest and demand is moderate. May and June also offer slightly lower prices with average demand, making them good options for a rental. In contrast, December tends to be the most expensive month due to higher demand, with January through March being particularly busy and moderately high in pricing. October and November show moderately high prices with steady demand.

Calendar Month	Temperature	Precipitation	Cloudiness	Demand	Pricing
January	70.9°F (21.6°C)	No Rain (Dry)	Mostly Sunny	Moderately High	Average
February	72.1°F (22.3°C)	No Rain (Dry)	Mostly Sunny	Moderately High	Average
March	73.2°F (22.9°C)	No Rain (Dry)	Mostly Sunny	Moderately High	Average
April	76.8°F (24.9°C)	No Rain (Dry)	Mostly Sunny	Average	Average
May	79.3°F (26.3°C)	Light Rain	Mostly Sunny	Average	Slightly Low
June	82.6°F (28.1°C)	Light Rain	Mostly Sunny	Average	Slightly Low
July	84.0°F (28.9°C)	Light Rain	Mostly Sunny	Average	Average
August	84.4°F (29.1°C)	Light Rain	Mostly Sunny	Average	Average
September	83.5°F (28.6°C)	Light Rain	Mostly Sunny	Moderately Low	Slightly Low
October	80.6°F (27.0°C)	Light Rain	Mostly Sunny	Moderately Low	Slightly High
November	76.5°F (24.7°C)	Light Rain	Mostly Sunny	Moderately Low	Slightly High
December	73.6°F (23.1°C)	No Rain (Dry)	Mostly Sunny	Average	Slightly High

Finding the cheapest car rentals in Grassy Key

Using our Search Wizard

If the deals that are available on our page do not suit your needs, then enter Grassy Key into the search wizard at the top of the page. We will compare all the best deals available for your car rental in Grassy Key and provide you with a list of the cheapest options, with no added fees.

Renting a car in Grassy Key

Pay at pickup is available, so you don’t have to worry about spending your money until you arrive at your vehicle in Grassy Key. We partner with reliable partners that guarantee an enjoyable experience for solo travelers, couples, and families. Package your car with a flight or hotel to unlock even more savings from Expedia.

Expected prices in Grassy Key

Prices are subject to seasonal change depending on when you decide to arrange your car rental but right now you can book from $4.

Flexibility & Cancellation

Most car suppliers offer penalty-free cancellations, so you don’t have to worry about losing money if your plans change. To cancel your booking log into your account through the Trips portal. Click manage booking and cancel this car. If you needed to alter your booking, then you can create a new one once you have canceled.

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Car classes available from Expedia in 2026

The classes of vehicles available will change depending on your chosen location.

• Compact car rentals    
• Convertible car rentals    
• Economy car rentals    
• Fullsize car rentals    
• Luxury car rentals
• Midsize car rentals    
• Mini car rentals    
• Minivan rentals    
• Pickup car rentals    
• Premium car rentals
• Sportscar rentals    
• Standard car rentals    
• SUV rentals    
• Van rentals