Best Time to Fly IAH to COS: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → City of Colorado Springs Municipal
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.0% of Houston (IAH) to Colorado Springs (COS) flights arrived on time (246 scheduled flights). That is in line with the national average of 77.6%.
SkyWest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (85% on time) and March the worst month (69%).
The cancellation rate was 0.4% (US average 1.8%).
IAH to COS 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 | 78.0% | 73 min | 0.4% | 246 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to COS
On-time arrival % by scheduled departure hour (local time), 559 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 92.3% | 0.0% | 65 |
| 4pm–5pm | Limited data | 1 | |
| 6pm–7pm | Limited data | 2 | |
| 7pm–8pm | 75.1% | 0.8% | 256 |
| 8pm–9pm | 76.0% | 0.8% | 235 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to COS
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) | 70.0% | -9.1 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 70.3% | -8.9 pts | 2.6% | 77 |
| All other days | 79.1% | — | 0.5% | 433 |
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).