You will find everything you need to know about drop-off on your booking confirmation email, it will have a specific time of drop-off as well as directions to the correct parking lot to leave your car, as Ubon Ratchathani Airport has two different parking lots. Once you have parked the car, a representative will do a walk through with you to ensure there is no damage done to the car and to log your mileage for payment purposes. Search rental cars on KAYAK