Passenger VariabilityA number of factors influence the flow of passengers moving through the preclearance process, as well as the time it can be expected to take for them to complete preclearance. These factors include: Scheduling and banking of flights with connecting preclearance passengers: Arrival time and distribution of arriving flights with connecting preclearance passengers affects the number of passengers that will require preclearance inspection at one time, as well as the number of passengers that arrive with the MCT. Percent of passengers originating at the airport versus connecting from a previous flight: Originating passengers tend to arrive at the airport two to three hours before departure, while connecting passengers may arrive up to the MCT before departure. Passenger characteristics: Primary preclearance inspection of U.S. citizens takes an average of 55 seconds, with 1-2 minutes for non-U.S. citizens. While the majority of preclearance passengers may only undergo primary inspection, a certain percentage will undergo secondary inspection as well. Process improvements and investments in technology may assist in decreasing inspection time.
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