Salt Lake City (SLC) to Missoula (MSO): On-Time Performance
Data through July 2026
The calendar drives reliability on SLC–MSO. June 2026 flights landed on schedule 97% of the time, but December 2024 dropped to 79% — a gap of 18 points. Across the full period the route averages 89% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 82%), which matters most in the rough months.
- On-time
- 89%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.5%
- Flights/day
- 2.9
- last 12 months
- Duration
- 1h 38m
- scheduled
- Distance
- 436 mi
Best airline from SLC to MSO
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlinesmost reliable | 92% | 4 min | 0.6% | 1,394 |
| Delta Air Lines | 83% | 18 min | 0.5% | 830 |
Monthly on-time trend
Best time to fly from SLC to MSO
Aim for departures around 9 a.m. (93% on-time); avoid 10 p.m. departures (81%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 90% | 12 min |
| Tuesday | 88% | 8 min |
| Wednesday | 84% | 14 min |
| Thursdaybest | 90% | 9 min |
| Friday | 89% | 8 min |
| Saturday | 89% | 7 min |
| Sunday | 90% | 6 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft13%
- Airline operations57%
- National airspace system14%
- Weather16%
Frequently asked questions
- How often are flights from SLC to MSO delayed?
- 12% of SLC–MSO 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 9 minutes.
- Which airline is most reliable from SLC to MSO?
- SkyWest Airlines has the best on-time record on this route at 92%, based on 1,394 flights. 2 airlines flew SLC–MSO frequently enough to compare in this period.
- What is the best time of day to fly from SLC to MSO?
- Departures around 9 a.m. have the best record (93% on-time), while departures around 10 p.m. have the worst (81%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SLC to MSO?
- The scheduled SLC–MSO flight time averages 1h 38m over 436 miles. Actual arrival times vary — flights on this route land 15+ minutes late 12% of the time.
- How often are SLC to MSO flights cancelled?
- 0.5% 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 SLC to MSO?
- December 2024 was the roughest month in this dataset, with only 79% of arrivals on time. The best was June 2026 at 97%. If your dates are flexible, that 18-point gap is worth planning around.
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Based on 2,224 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.