Billings Logan International Airport is in the western United States, two miles northwest of downtown Billings, in Yellowstone County, Montana. It is the fourth largest airport in Montana, having been surpassed in recent years by Bozeman, Missoula, and Flathead County (Kalispell) in both number of gates as well as annual enplanements. Owned by the city of Billings, the airport is on top of the Rims, a 500-foot (150 m) cliff overlooking the downtown core, and covers 2,500 acres of land.

Billings is the most populous city in the U.S. state of Montana, with a population of 117,116 as of the 2020 census. Located in the south-central portion of the state, it is the seat of Yellowstone County and the principal city of the Billings Metropolitan Area, which had a population of 184,167 in the 2020 census. With one of the largest trade areas in the United States, Billings is the trade and distribution center for much of Montana east of the Continental Divide. Billings is also the largest retail destination for much of the same area. The Billings Chamber of Commerce claims the area of commerce covers more than 125,000 square miles (320,000 km2). In 2009, it was estimated to serve over 500,000 people.