[3] The National Plan of Integrated Airport Systems for 2011–2015 categorized it as a primary commercial service facility (more than 10,000 enplanements per year).

[4] Federal Aviation Administration records show that the airport had 442,788 passenger boardings (enplanements) in calendar year 2013,[5] 434,038 in 2012 and 397,870 in 2011.

[6] In 2011, a terminal expansion designed by Prugh & Lenon Architects opened, adding three gates and more retail concessions.

[7] The airport had an expansion of service in 2020 and 2021 to a record 31 nonstop destinations as airlines entered the market or added new routes to serve increased leisure demand.

[12] This expansion, the largest ever in Montana history, will include the addition of three new baggage carousels, a second security checkpoint, and the capability to add on three more gates.