18 destinations have scheduled flights from BIL, about 125 departures a week. Weekly frequencies come from airline schedules and observed departures, not live status.
| Destination | Flights per week | Airlines | Typical duration |
|---|---|---|---|
| Portland International (PDX) | 18 | Alaska Airlines | — |
| Richland Municipalcipal (SDY) | 15 | Hyannis Air Service, Inc. d/b/a Cap | — |
| Denver International (DEN) | 14 | Delta Air Lines, United Airlines | — |
| Dallas/Fort Worth International (DFW) | 13 | Envoy Air Inc. | — |
| Glasgow Valley County Airport (GGW) | 11 | Hyannis Air Service, Inc. d/b/a Cap | — |
| Dawson Community (GDV) | 8 | Hyannis Air Service, Inc. d/b/a Cap, Alpine Air Express | — |
| Salt Lake City International (SLC) | 8 | Delta Air Lines, UPS Airlines | — |
| Havre (HVR) | 7 | Hyannis Air Service, Inc. d/b/a Cap | — |
| Seattle-Tacoma International (SEA) | 7 | Alaska Airlines | — |
| Wolf Point (OLF) | 6 | Hyannis Air Service, Inc. d/b/a Cap | — |
| Great Falls International Airport (GTF) | 5 | Empire Airlines | — |
| Louisville International (Standiford Field) (SDF) | 5 | UPS Airlines | — |
| Williams Gateway (AZA) | 3 | Allegiant Air LLC | — |
| Gallatin Field (BZN) | 1 | Alpine Air Express | — |
| Cut Bank (CTB) | 1 | Alpine Air Express | — |
| Glacier Park International (FCA) | 1 | Alpine Air Express | — |
| Campbell County (GCC) | 1 | Alpine Air Express | — |
| Reno (RNO) | 1 | UPS Airlines | — |
GET /routes returns each scheduled flight from BIL: airline, flight number, departure and arrival time, duration, days of operation and aircraft type.
https://www.goflightlabs.com/routes?access_key=YOUR_ACCESS_KEY&dep_iata=BIL
That URL still says YOUR_ACCESS_KEY.
A 7-day trial replaces it with a real key. After the trial, Starter is $24.99/mo.