(Updated )
On your final day in Guam, work backward from your flight time so you have enough time to refuel and return the car. This guide walks through fuel, the gas receipt, cleaning, return time, vehicle inspection and the shuttle to the airport or your hotel at ONE’S Rent A Car.

Bring the car back to the ONE’S Tumon office by the time in your contract. If you might be late, call the office right away. You can’t extend a rental by phone alone; the renter and the credit card holder need to come to the office and pay for the extension.
After you return the car, a free shuttle runs from the office to Guam International Airport or your hotel. Leave enough time for refueling and the inspection so you reach check-in with time to spare. If you take a taxi instead, the fare isn’t reimbursed.
ONE’S cars go out with a full tank and should come back full. In the rare case the tank wasn’t full at pickup, return it at the same level. If you’re unsure, ask the office before you fill up. Any fuel beyond that isn’t reimbursed.
If the wrong fuel is used, the current terms list a $400 NOC (non-operation charge), a $150 service fee and the cost of replacing the fuel, regardless of insurance. If you realize you’ve put in the wrong fuel, don’t start the engine. Contact the station and ONE’S.

After a beach day, it’s easy to leave sand, wet towels and sunscreen marks behind. Remove all belongings and inspect the seats, footwells, floor mats, trunk and inside door panels.
The current terms list these condition-based cleaning charges:
No smoking in the car, and pets are generally not allowed. If the car needs more than a quick cleanup, check with the office before using any cleaning products.
The terms list charges of $200–$800, depending on the situation, for items such as a lost or wet key, missing hubcap or a battery drained through renter negligence. Once a key is reported lost, the locks are reprogrammed right away for security, so the new-key charge applies even if you find it later.
The renter must pay any violation ticket plus a $100 company service fee. The terms also list a $1,000 penalty for an unreported ticket, so contact ONE’S as soon as you receive one.
At the office, walk around the car with staff. Photos or video of the car and check sheet from pickup make it easier to tell existing marks from new damage.
For an accident or new damage such as a deep scratch or dent, the terms state that a $150 company service fee is charged to the card on file. Coverage and deductibles depend on the protection purchased and the circumstances, so ask staff to walk you through the itemized charges.
Yes, as a rule. In the rare case the tank wasn’t full at pickup, return it at the same level. Ask the office if you’re unsure. Bring a same-day gas receipt to show at return.
No. Call the office right away, but to extend, the renter and cardholder must pay at the office. Don’t keep the car past your return time without approval.
Yes. ONE’S runs a free shuttle from the office to the airport or your hotel. Return early enough to leave time for refueling and the inspection. If you take a taxi instead, the fare isn’t reimbursed.
A smooth ONE’S return starts with checking the time, refueling on return day, keeping the receipt, cleaning out the car, confirming keys and accessories, and inspecting the vehicle with staff. A free shuttle to the airport or your hotel is available, but don’t leave it to the last minute: return the car well before your flight.
Fact-checked September 13, 2026. Rates, protection, fuel requirements and shuttle procedures may change. Follow your rental contract, the current ONE’S official site and staff instructions on the day of return.