Just like departures, passengers of all flights arriving at Missoula International Airport are liable to go through TSA security screening upon their entry to the United States. Security procedures can take some time, depending on the weather conditions or flight delay. Hence, plan accordingly and double-check you have enough time to get to your flight if you are connecting flights.
Security procedures are similar to those on departures. Passengers are required to go through a body scanner, whereas their checked-in baggage and electronic devices are scanned separately. It is vital to adhere to all the requirements of airport security agents. Answer all the questions genuinely and honestly at the Customs and Border Protection (CBP), where agents try to determine your legal status.