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Book a car rental at Ontario Airport with Avis for a seamless transition from airline to curbside. With a wide selection of vehicles and easy access to I-10 and I-15, we offer practical choices for getting around Ontario, Riverside, and the greater Southern California area.
AIRLINE PASSENGERS: Follow signs to the baggage claim area. Proceed downstairs to the street level and exit the terminal. Take the common airport shuttle bus to the Ground Transportation Center.
WALK-UP RENTERS Follow airport signs for Rental Car Return. They will lead to the Avis car rental lot.
AIRLINE PASSENGERS: Follow signs to the baggage claim area. Proceed downstairs to the street level and exit the terminal. Take the common airport shuttle bus to the Ground Transportation Center. Show your drivers license and identify yourself as a Preferred Renter to the Avis rental agent in order to receive your preprinted rental document and keys.
FROM 4:30 AM TO MIDNIGHT: Park & lock the car. If an agent is not available, place the completed contract & the keys in the key drop box.
FROM MIDNIGHT TO 4:30 AM: Park & lock the car. Avis is closed, so take the keys to the security guard.
How it Works:
Customer can fill out contract and drop keys inside the drop box located at the location.
Lock the vehicle and place the keys and contract in the key drop box. The box is labeled Avis Budget After Hours Returns.
Don't forget to remove all your belongings from the vehicle prior to returning the keys.
A vehicle that is returned after hours will not be checked in until the next business day. If returning after hours when a location is closed, the customer is responsible for the vehicle until the satisfactory check in of the rental vehicle the next business day.
With a wide range of Ontario airport rental cars, we make it easy to find the perfect ride for your travel plans. Our location is a practical starting point for local trips and regional travel. After picking up your Ontario International Airport car rental, you’re within a short drive of the Ontario Convention Center, Auto Club Speedway, and other popular attractions in the greater Los Angeles area.


SUV Rental
Seat 5–8 people in a comfortable and rugged SUV rental at ONT, perfect for outdoor adventures to Lake Arrowhead or Mount San Antonio.

Sedan Rental
A sedan rental at ONT makes it easy to move between Ontario, downtown Riverside, and LA without the bulk—simple, efficient, and built for everyday driving.

Van Rental
Traveling with a crowd? Rent a roomy passenger van or minivan at ONT to easily transport big groups anywhere from the California Botanic Garden to Huntington Beach.
Pickup Truck Rental
A pickup truck rental at ONT gives you the space to bring bikes, coolers, or camping gear for trips to Mount Baldy and the San Bernardino National Forest.

Turn heads with a luxury car rental at ONT—ideal for business meetings in Ontario or evenings out across the Inland Empire and nearby LA hotspots.

EV Rental
An EV rental at ONT keeps things efficient with zero fuel stops and access to charging along I-10 and I-15 for longer Southern California drives.
The Ontario International Airport is considered medium-sized. While not as large as LAX, ONT is one of the fastest-growing airports in America.
ONT is moderately busy, with the busiest times being mornings from 5:00 AM to 9:00 AM and evenings from 7:00 PM to 11:00 PM. While the TSA recommends arriving at the Ontario International Airport about two hours before your flight, the average passenger flow is under an hour. (Source)
LAX and ONT are great airports with many flight options. The best airport for you depends on your preferences and destination. ONT is about 40 miles from downtown Los Angeles, but is smaller and easier to navigate. Avis is here for you, no matter which airport you use, with an on-site rental counter at LAX, too.
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Cancellation Policy