Altus Air Force Base, about six kilometres east-northeast of downtown, is the economic and demographic anchor of the city. It opened during World War II as a training base for bomber crews and was reactivated in 1953; today it houses the 97th Air Mobility Wing and is the formal training base for C-17 Globemaster and KC-46 Pegasus pilots, plus the boom operators who work the tankers.
The base is not generally open to the public, though it occasionally holds open days and air shows with formation flyovers — worth catching if your visit coincides. The aircraft pattern over the city is constant and the rolling thunder of a four-engine transport overhead is the soundtrack of Altus. The base gate is visible from US-62.