| Airlines and Aircraft Serving Helena Effective November 15, 1979 |
| BIG SKY AIRLINES Aircraft Operated: Cessna, Handly Page Jetstream Destinations Served: Billings (MT), Butte (MT), Missoula (MT) FRONTIER AIRLINES Aircraft Operated: Boeing 737-200 Destinations Served: Billings (MT), Missoula (MT) NORTHWEST ORIENT AIRLINES Aircraft Operated: Boeing 727-200 Destinations Served: Billings (MT), Bozeman (MT), Missoula (MT), Spokane (WA) WESTERN AIRLINES Aircraft Operated: Boeing 737-200 Destinations Served: Butte (MT) |