Great Falls (GTF) to Salt Lake City (SLC): On-Time Performance
Data through July 2026
The calendar drives reliability on GTF–SLC. June 2025 flights landed on schedule 99% of the time, but March 2026 dropped to 82% — a gap of 17 points. Across the full period the route averages 93% on-time against a national 78%.
- On-time
- 93%
- arrived <15 min late
- Avg delay
- 5 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 2.9
- last 12 months
- Duration
- 1h 37m
- scheduled
- Distance
- 463 mi
Monthly on-time trend
Best time to fly from GTF to SLC
Aim for departures around 5 a.m. (96% on-time); avoid 6 p.m. departures (90%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 91% | 5 min |
| Tuesdaybest | 96% | 3 min |
| Wednesday | 95% | 7 min |
| Thursday | 93% | 5 min |
| Friday | 92% | 5 min |
| Saturday | 93% | 7 min |
| Sunday | 92% | 4 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Airline operations63%
- National airspace system7%
- Weather30%
Frequently asked questions
- How often are flights from GTF to SLC delayed?
- 7% of GTF–SLC flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 5 minutes.
- What is the best time of day to fly from GTF to SLC?
- Departures around 5 a.m. have the best record (96% on-time), while departures around 6 p.m. have the worst (90%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GTF to SLC?
- The scheduled GTF–SLC flight time averages 1h 37m over 463 miles. Actual arrival times vary — flights on this route land 15+ minutes late 7% of the time.
- How often are GTF to SLC flights cancelled?
- 0.4% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from GTF to SLC?
- March 2026 was the roughest month in this dataset, with only 82% of arrivals on time. The best was June 2025 at 99%. If your dates are flexible, that 17-point gap is worth planning around.
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Based on 2,196 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.