| Airlines and Aircraft Serving Billings Effective July 1, 1983 |
| CONTINENTAL AIRLINES Aircraft Operated: McDonnell Douglas DC-9-10, McDonnell Douglas DC-9-30 Destinations Served: Denver (CO), Great Falls (MT) FRONTIER AIRLINES Aircraft Operated: Boeing 737-200 Destinations Served: Denver (CO), Great Falls (MT), Helena (MT) NORTHWEST ORIENT AIRLINES Aircraft Operated: Boeing 727-200 Destinations Served: Great Falls (MT), Helena (MT), Minneapolis/Saint Paul (MN), Spokane (WA) WESTERN AIRLINES Aircraft Operated: Boeing 737-200 Destinations Served: Salt Lake City (UT) |