Which airport code represents Missoula, Montana?

The airport code representing Missoula, Montana, is MSO. Airport codes are typically assigned by the International Air Transport Association (IATA) and often reflect a portion of the city’s name, making them easier to remember. In this case, MSO stands for Missoula International Airport.

The other choices represent different airports: MKE is the code for General Mitchell International Airport in Milwaukee, Wisconsin; LGA is for LaGuardia Airport in New York City; and HRL is the code for Valley International Airport in Harlingen, Texas. This distinguishes MSO as the correct choice for the Missoula airport code.