BOZEMAN, MT (May 15, 2024) The Gallatin Airport Authority is pleased to introduce the next chapter of growth and development at the Bozeman Yellowstone International Airport (BZN). Construction is currently underway in preparation for the largest expansion in our airport's history, the East Terminal Expansion project (ETEP). ETEP is a multi-phase, $140-180-million-dollar investment designed to enhance passenger and guest experience, increase capacity, and develop crucial infrastructure to support BZN's current and future growth.