Montreal Pierre Elliott Trudeau Intl Airport Alamo car rentals return process is simple and straightforward. First, find your way to the Alamo car rental return lanes located in the parking garage attached to the terminal. Park your car in the designated Alamo car rental return lane. Then, proceed to the kiosk at 975 ROMEO-VACHON, DORVAL, H4Y 1H1, Quebec, QC, Quebec to return your car key. Before returning the key, be sure you collect your belongings from the car.