$34 Car Rental O'Fallon, IL

These O'Fallon insights are based on real traveler data from Expedia, aggregated using AI to help you plan your trip. Updated: August 17, 2026.

Reasons to book a car rental in and around O'Fallon

Renting a car in O'Fallon provides the freedom and flexibility to explore the area and its attractions at your own pace. With a rental vehicle, you can easily visit key sites such as the Gateway Arch, located 15 miles away, and the Cahokia Mounds State Historic Site, just 10 miles from O'Fallon. This convenience is particularly appealing for families, as it allows for easy luggage management and a comfortable travel experience. You can also explore nearby cities like Shiloh, which is only 2 miles away, and Fairview Heights, located 5 miles from O'Fallon, both of which offer additional attractions like the St. Clair County Historical Society and City Museum.

A car rental is ideal for those seeking outdoor and cultural experiences, as you can decide your travel itinerary without relying on public transportation. Whether you're planning a day trip to the bustling metropolis of St. Louis, just 16 miles away, or exploring the local history and nature around O'Fallon, having a car allows you to make the most of your visit with ease and comfort.

Most popular car rentals in O'Fallon

• Midsize: The midsize car option is among the most popular choices for travelers in O'Fallon. It comfortably accommodates up to 5 travelers and allows for the transportation of up to 3 large suitcases. This makes it an ideal selection for couples and families looking for a balance of space and maneuverability, ensuring you can explore the area at your own pace without sacrificing comfort.
• Compact: The compact car is another highly booked option in O'Fallon, perfect for various travel groups, including solo travelers, couples, and families. It also accommodates 5 travelers but is designed to hold up to 3 medium suitcases, providing a practical solution for those who prioritize fuel efficiency and easy parking while still having enough room for essentials during your trip.
• Midsize SUV: For those wanting a bit more space, the midsize SUV is a preferred choice among travelers in O'Fallon. Like the midsize car, it accommodates 5 travelers and can carry up to 3 large suitcases. This option is particularly well-suited for families, couples, or small groups seeking additional comfort and versatility as they navigate the local area, offering a higher driving position and greater cargo capacity.

Top rated car suppliers in O'Fallon

• Hertz: With a rental location conveniently situated in O'Fallon, Hertz is a top choice for those seeking flexibility and ease of travel. Known for its reliable service, Hertz offers a range of vehicles, with Midsize SUVs and Economy cars being among the most booked options. This supplier is ideal for travelers looking to explore the area at their own pace while managing their luggage effortlessly.
• Enterprise: Another popular option in O'Fallon, Enterprise has a rental location that provides excellent service and a wide selection of vehicles. Travelers frequently choose Midsize and Fullsize cars, making it a great choice for families or groups needing extra space. Enterprise is known for its commitment to customer satisfaction, ensuring a smooth and enjoyable rental experience.
• Dollar Rent A Car: Dollar Rent A Car also has a rental location in O'Fallon, offering travelers convenient access to their vehicles. Midsize and Fullsize cars are particularly popular with customers, providing a good balance of comfort and affordability. With a focus on providing value, Dollar Rent A Car allows you to explore the surrounding attractions with ease and flexibility.

Where to stay around O'Fallon

• O'Fallon: A charming city ideal for families and those seeking a city-themed experience. While staying here, you can enjoy local amenities and parks, making it a great base for exploring neighboring areas. O'Fallon provides access to various restaurants and shopping options, ensuring a comfortable stay.
• Shiloh: Located 2 miles away from O'Fallon, Shiloh offers a blend of recreational areas and shopping centers, making it perfect for families and outdoor enthusiasts. Key attractions include local parks and lakes, providing opportunities for relaxation and exploration. Don't miss the nearby Cahokia Mounds State Historic Site and the St. Clair County Historical Society for a touch of history.
• Fairview Heights: Just 5 miles from O'Fallon, Fairview Heights is known for its shopping mall center and vibrant arena entertainment facilities. This city attracts families and city explorers alike, with excellent dining options available. Popular sites here include the Gateway Arch and the Cahokia Mounds State Historic Site, perfect for a cultural vacation.
• St. Louis: A bustling metropolis located 16 miles from O'Fallon, St. Louis is a must-visit for its diverse attractions. Ideal for families, you can explore the Gateway Arch, City Museum, and Six Flags St. Louis. The city also boasts urban parks and stadiums, along with a variety of restaurants and wineries, making it a vibrant destination for all travelers.

10 tips to save on your car rental in and around O'Fallon

1. Use filters to find the right car: Refine your search based on vehicle type and features. Whether you need an SUV for added space, a convertible for summer fun, or an economy car for cost-effectiveness, utilize the filters on Expedia to locate the best option for your trip.
2. Book in advance to help lower costs: Rental prices can vary with demand, so it's advisable to reserve your car well ahead of your trip. By booking early, you are likely to secure more favorable rates and better availability, particularly during peak seasons.
3. Consider a smaller car for savings: Smaller cars typically cost less to rent and are easier to maneuver in crowded areas. Mid-size rentals strike a good balance between affordability, comfort, and fuel efficiency.
4. Age guidelines: Drivers under 30 may encounter higher deposits or daily fees, and certain vehicles—such as SUVs or premium models—might not be available. Renters over 70 may also face similar restrictions. Always verify the age requirements before making a reservation.
5. Check fuel policies: Some rentals operate on a full-to-full fuel policy, requiring you to return the car with a full tank to avoid additional fees. This is usually the most economical choice. Others may provide full-to-empty or prepaid fueling options, which can work well too—just ensure the car is returned empty in that case.
6. Save on city and airport pickups: Picking up your rental car at airports often incurs a surcharge, but it may be worthwhile for the added convenience.
7. Know your payment options: Many car rental companies accept only credit cards for payment.
8. Understand your insurance coverage: Car rental insurance can help you avoid unexpected expenses and provides peace of mind in case of unforeseen incidents during your trip. It's easy to add car rental insurance when booking through Expedia.
9. Consider unlimited mileage: If you're planning extensive road trips, look for rentals with unlimited mileage to avoid additional charges.
10. Bring your driver's license and ID: A valid driver's license is necessary to rent a car.

Best time to rent a car in and around O'Fallon

The best time to rent a car in and around O'Fallon is January and February, when prices and demand are both slightly low, offering great value. April and May can also be appealing, as they generally see average prices and high demand. However, July tends to be the most expensive month, with high demand, making it a busy time for rentals. June sees similar trends, so it’s wise to plan accordingly if you’re considering a summer trip.

Calendar Month	Temperature	Precipitation	Cloudiness	Demand	Pricing
January	31.6°F (-0.2°C)	Light Rain	Mostly Cloudy	Slightly Low	Slightly Low
February	34.9°F (1.6°C)	Light Rain	Mostly Sunny	Slightly Low	Slightly Low
March	46.2°F (7.9°C)	Light Rain	Mostly Sunny	Slightly Low	Slightly High
April	55.8°F (13.2°C)	Light Rain	Mostly Sunny	Average	Average
May	66.2°F (19.0°C)	Light Rain	Mostly Sunny	Slightly High	Average
June	75.6°F (24.2°C)	Light Rain	Mostly Sunny	Slightly High	Slightly High
July	77.9°F (25.5°C)	Light Rain	Mostly Sunny	Slightly High	Slightly High
August	76.1°F (24.5°C)	Light Rain	Mostly Sunny	Average	Average
September	70.2°F (21.2°C)	Light Rain	Mostly Sunny	Average	Average
October	58.3°F (14.6°C)	Light Rain	Mostly Sunny	Average	Average
November	45.9°F (7.7°C)	Light Rain	Mostly Sunny	Average	Average
December	37.6°F (3.1°C)	Light Rain	Mostly Sunny	Average	Slightly Low

Finding the cheapest car rentals in O'Fallon

Using our Search Wizard

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

Renting a car in O'Fallon

Pay at pickup is available, so you don’t have to worry about spending your money until you arrive at your vehicle in O'Fallon. 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 O'Fallon

Prices are subject to seasonal change depending on when you decide to arrange your car rental but right now you can book from $34.

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