Great Falls International (GTF) Delays and On-Time Departures
Great Falls, MT · ranked 11th of 333 airports for on-time departures
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, Great Falls (GTF) had 2,168 scheduled departures and 88.9% of them left on time (US average 77.4%).
That ranks 11th of 333 US airports tracked on this site, with 0.8% of departures cancelled.
Among airlines at Great Falls (GTF), SkyWest Airlines left on time most often (91.8%).
Over 24 months, Wednesday was the most reliable day (92% on time) and February the worst month (86%).
Best time of day to fly out of Great Falls (GTF)
On-time departure % by scheduled departure hour (local time), last 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 97.3% | 0.1% | 941 |
| 6am–7am | 92.9% | 0.5% | 778 |
| 7am–8am | 95.8% | 1.4% | 144 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | 95.5% | 0.0% | 88 |
| 11am–12pm | 94.6% | 0.0% | 369 |
| 12pm–1pm | 95.7% | 0.0% | 116 |
| 1pm–2pm | 92.1% | 1.4% | 347 |
| 2pm–3pm | 79.6% | 0.5% | 768 |
| 3pm–4pm | 90.9% | 0.0% | 33 |
| 4pm–5pm | 71.5% | 0.8% | 117 |
| 5pm–6pm | 76.8% | 0.0% | 112 |
| 6pm–7pm | 89.1% | 0.3% | 664 |
| 7pm–8pm | Limited data | 23 | |
| 8pm–9pm | 72.2% | 0.0% | 54 |
| 9pm–10pm | 75.5% | 0.0% | 49 |
| 10pm–11pm | 64.4% | 2.2% | 46 |
Airlines at GTF ranked by on-time departures
Last 12 months. Airlines with fewer than 30 departures are marked “limited data”.
| Airline | On-time departures | On-time arrivals | Cancelled | Departures |
|---|---|---|---|---|
| SkyWest Airlines | 91.8% | 91.3% | 0.8% | 1,439 |
| United Airlines | 83.9% | 83.5% | 0.9% | 527 |
| Allegiant Air | 81.1% | 82.1% | 0.5% | 202 |
80%+ good 70–79.9% fair <70% poor
Best day to fly out of GTF
On-time departures by day, 24 months.
Best month to fly out of GTF
On-time departures by month, 24 months.
Holiday travel at Great Falls (GTF)
On-time departures during holiday periods compared with all other days, last 24 months.
| Period | On-time departures | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 90.0% | +0.4 pts | 1.2% | 81 |
| Christmas & New Year (Dec 20 - Jan 3) | 90.8% | +1.1 pts | 0.0% | 173 |
| Summer peak (Jun 15 - Aug 15) | 88.8% | -0.8 pts | 0.2% | 787 |
| All other days | 89.6% | — | 0.5% | 3,609 |
Monthly on-time departure trend at GTF
On-time departure % each month, with the 12-month US average for reference.
Routes from Great Falls (GTF)
Every route from GTF with its own page, by number of flights (last 12 months, on-time arrivals).
| To | On time | Cancelled | Flights |
|---|---|---|---|
| GTF → Salt Lake City (SLC) | 92.5% | 0.8% | 1,071 |
| GTF → Denver (DEN) | 85.7% | 1.0% | 728 |