$31 Car Rental Ontario, CA

These Ontario 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 Ontario

Renting a car in Ontario, California offers the freedom and flexibility to explore the city and its surroundings at your own pace. With a rental vehicle, you can easily manage your luggage and create a travel plan that suits your needs, whether you are traveling for family fun, business, or a city-themed experience. Key attractions such as Cucamonga-Guasti Regional Park and Scandia Amusement Park are conveniently located within the Ontario area, making them accessible for family outings and outdoor adventures. Additionally, the BAPS Shri Swaminarayan Mandir, just 7 miles away, provides a unique cultural experience. A rental car also allows you to venture into nearby cities like Upland and Montclair, both only 2 miles from Ontario, where you can enjoy local attractions, shopping, and dining. The neighborhood of Guasti is another area to explore, featuring both the regional park and shopping venues. Overall, having a rental car enhances your travel experience by providing convenience and the ability to discover a variety of destinations in and around Ontario.

Most popular car rentals in Ontario

• Midsize SUV: This option accommodates 5 travelers and can hold up to 3 large suitcases, making it ideal for families, couples, or small groups. With a midsize SUV, you can enjoy a comfortable ride while having ample space for luggage, allowing for a more flexible travel experience around Ontario.
• Standard SUV: Perfect for couples, families, or groups, the standard SUV also accommodates 5 travelers but has space for up to 2 medium suitcases. This option strikes a good balance between comfort and utility, making it a popular choice for those looking to explore Ontario with ease.
• Fullsize: Accommodating 5 travelers with room for either up to 3 large suitcases or 5 medium suitcases, the fullsize vehicle is excellent for families and groups needing extra luggage space. This versatility makes it a favored choice, providing comfort for all passengers while ensuring you have enough room for your belongings.

Top rated car suppliers in Ontario

• Alamo Rent A Car: Alamo is a popular choice among travelers in Ontario, known for its friendly service and hassle-free rental experience. With 1 rental location in the area, Alamo boasts an overall rating of 7 out of 10. Customers appreciate the cleanliness of their vehicles and the swift pickup process. The most booked cars with Alamo are Midsize SUVs and Premium SUVs, making it an excellent option for those needing extra space or comfort during their travels.
• Fox Rental Cars: Fox Rental Cars, with 1 rental location in Ontario, is known for its competitive offerings and a solid selection of vehicles. Travelers frequently choose Midsize and Fullsize cars, providing a comfortable and spacious ride for various travel needs. Fox’s reputation for efficiency makes it a convenient option for those looking to explore Ontario and the surrounding areas at their own pace.
• Thrifty Car Rental: Thrifty Car Rental stands out with 2 rental locations in Ontario, giving travelers greater flexibility. With a focus on Midsize SUVs and Fullsize cars, Thrifty caters to those needing both comfort and capability. Known for its accessible service and well-maintained fleet, Thrifty is an excellent option for budget-conscious travelers who do not want to compromise on quality.

Where to stay around Ontario

• Rancho Cucamonga: Located 4 miles from Ontario, Rancho Cucamonga offers a vibrant mix of family-friendly attractions and business facilities. Visitors can enjoy shopping at the local shopping centers, while highlights include the beautiful Victoria Gardens and the Ontario Convention Center. The area is also home to the entertaining LoanMart Field, perfect for those interested in city-themed experiences. Dining options abound, including restaurants and local wineries, making it a great choice for a well-rounded stay.
• Upland: Just 2 miles from Ontario, Upland is an excellent destination for family vacations or business trips. The city features a variety of shopping centers and educational venues. Notable attractions include Bowlero Upland for bowling enthusiasts and the Ontario Convention Center for culture lovers. Upland's proximity to Victoria Gardens also enhances the area’s appeal, along with various dining options ranging from casual eateries to wineries.
• Pomona: Situated 6 miles from Ontario, Pomona caters to business travelers and those seeking entertainment. The city features shopping centers and arts venues, with highlights like the Wally Parks NHRA Motorsports Museum for culture enthusiasts and In-N-Out Burger Pomona Dragstrip for adventure seekers. Visitors can also explore the serene BAPS Shri Swaminarayan Mandir, adding a cultural touch to their stay. Pomona offers a diverse dining scene with plenty of restaurants and wineries nearby.

10 tips to save on your car rental in and around Ontario

1. Use filters to find the right car: Refine your search by selecting specific vehicle types and features. Whether you're looking for an SUV for added space, a convertible for summer drives, or an economical car for budget-friendly travel, utilize the filters on Expedia to discover the best options for your journey.
2. Book in advance to help lower costs: Rental prices can vary based on demand, so it’s advisable to reserve your car well before your trip. Booking ahead often leads to lower rates and greater availability, particularly during peak travel seasons.
3. Consider a smaller car for savings: Smaller vehicles are typically more affordable to rent and easier to maneuver in crowded areas. Mid-size rentals strike a good balance between cost, comfort, and fuel efficiency.
4. Age guidelines: Drivers under 30 may encounter higher deposits or daily surcharges, and certain vehicle categories—such as SUVs or luxury models—might not be accessible. This can also apply to renters over 70 years old. Always verify the age requirements before making a reservation.
5. Check fuel policies: Some rental agreements require a full-to-full fuel policy, meaning you must return the vehicle with a full tank to avoid additional charges. This is generally the most favorable option. Others may offer full-to-empty or prepaid fueling alternatives, which are acceptable as well. Just ensure you return the car empty in those cases.
6. Save on city and airport pickups: Picking up your rental car at airports often incurs a surcharge, but the added convenience might justify the extra cost.
7. Know your payment options: Many car rental companies exclusively accept credit cards for payments.
8. Understand your insurance coverage: Car rental insurance can help prevent unexpected expenses and provides peace of mind in case something unforeseen occurs during your trip. Adding car rental insurance when booking through Expedia is a straightforward process.
9. Consider unlimited mileage: If you plan on taking long road trips, seek rentals that offer unlimited mileage to avoid incurring extra 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 Ontario

The best time to rent a car in and around Ontario is January and February, when both prices and demand are slightly low. As spring approaches, March and April see average prices and demand, making them decent shoulder months. However, June through August tend to be the busiest and most expensive times, with high demand and slightly high prices. After the summer rush, September drops back to slightly low prices with average demand, while October and November show moderately high prices with steady demand.

Calendar Month	Temperature	Precipitation	Cloudiness	Demand	Pricing
January	53.6°F (12.0°C)	Light Rain	Sunny	Slightly Low	Slightly Low
February	54.3°F (12.4°C)	Light Rain	Sunny	Slightly Low	Slightly Low
March	56.8°F (13.8°C)	No Rain (Dry)	Sunny	Average	Average
April	61.9°F (16.6°C)	No Rain (Dry)	Sunny	Average	Average
May	65.5°F (18.6°C)	No Rain (Dry)	Sunny	Slightly High	Average
June	72.5°F (22.5°C)	No Rain (Dry)	Sunny	Slightly High	Slightly High
July	78.4°F (25.8°C)	No Rain (Dry)	Sunny	Slightly High	Slightly High
August	79.3°F (26.3°C)	No Rain (Dry)	Sunny	Average	Average
September	76.6°F (24.8°C)	No Rain (Dry)	Sunny	Average	Slightly Low
October	68.7°F (20.4°C)	No Rain (Dry)	Sunny	Slightly Low	Slightly High
November	60.1°F (15.6°C)	No Rain (Dry)	Sunny	Average	Average
December	53.1°F (11.7°C)	Light Rain	Sunny	Average	Average

Finding the cheapest car rentals in Ontario

Using our Search Wizard

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

Renting a car in Ontario

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

Prices are subject to seasonal change depending on when you decide to arrange your car rental but right now you can book from $31.

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