Best Time to Fly MSO to SLC: On-Time Stats by Hour & Airline
Missoula Montana → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 91.4% of Missoula (MSO) to Salt Lake City (SLC) flights arrived on time (1,059 scheduled flights). That is 13.8 points above the national average of 77.6%.
Among 2 airlines, SkyWest Airlines led with 92.3% on time and Delta Air Lines was last with 90.3%.
Over 24 months, Monday was the most reliable day (94% on time) and February the worst month (84%).
The cancellation rate was 0.9% (US average 1.8%).
MSO to SLC on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 92.3% | 52 min | 1.4% | 592 |
| Delta Air Lines | 90.3% | 126 min | 0.4% | 467 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MSO to SLC
On-time arrival % by scheduled departure hour (local time), 2,131 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 87.3% | 0.1% | 725 |
| 11am–12pm | 93.5% | 0.5% | 186 |
| 12pm–1pm | 90.1% | 0.0% | 121 |
| 1pm–2pm | 92.2% | 2.0% | 409 |
| 2pm–3pm | Limited data | 5 | |
| 3pm–4pm | Limited data | 3 | |
| 5pm–6pm | 86.1% | 0.0% | 36 |
| 6pm–7pm | 90.8% | 0.3% | 646 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MSO to SLC
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 90.0% | -0.5 pts | 0.0% | 40 |
| Christmas & New Year (Dec 20 - Jan 3) | 84.2% | -6.4 pts | 0.0% | 82 |
| Summer peak (Jun 15 - Aug 15) | 89.2% | -1.4 pts | 0.0% | 370 |
| All other days | 90.5% | — | 0.7% | 1,639 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).