Best Time to Fly COS to SLC: On-Time Stats by Hour & Airline
City of Colorado Springs Municipal → Salt Lake City International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 93.3% of Colorado Springs (COS) to Salt Lake City (SLC) flights arrived on time (721 scheduled flights). That is 15.7 points above the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Monday was the most reliable day (94% on time) and July the worst month (84%).
The cancellation rate was 0.1% (US average 1.8%).
COS 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 | 93.3% | 63 min | 0.1% | 721 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly COS to SLC
On-time arrival % by scheduled departure hour (local time), 1,111 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 95.3% | 0.0% | 86 |
| 8am–9am | 94.7% | 0.0% | 644 |
| 11am–12pm | 96.4% | 0.0% | 55 |
| 12pm–1pm | 92.9% | 0.0% | 98 |
| 5pm–6pm | 85.1% | 0.0% | 135 |
| 6pm–7pm | 85.9% | 1.1% | 93 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on COS 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) | Limited data | 19 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 92.7% | -1.1 pts | 0.0% | 41 |
| Summer peak (Jun 15 - Aug 15) | 89.5% | -4.3 pts | 0.0% | 210 |
| All other days | 93.8% | — | 0.1% | 841 |
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).