- 524-3445 Parking Customer Service (801) 575-2887 Customer Service (801) 575-2400 Carnet & Customs Instructions Carnet users must have their carnets validated both when arriving and departing. 1) Bring Carnet and items to the CBP Office in the Main Terminal, Ground Level on the west end by Starbucks. Hours of Operation: 12:30-5:30p.m. daily for Carnet Validation. Best to call ahead. Source: https://slcairport.com/maps/airport-map/ SLC - Salt Lake City International Airport U.S. Customs and Border Protection Information is accurate as of June 3, 2025 but can change at any time. Please allow sufficient time to locate customs and get your carnet validated should the location of customs change due to conditions beyond our control.