Best Time to Fly COS to ORD: On-Time Stats by Hour & Airline
City of Colorado Springs Municipal → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.4% of Colorado Springs (COS) to Chicago (ORD) flights arrived on time (1,001 scheduled flights). That is 2.2 points below the national average of 77.6%.
Among 2 airlines, United Airlines led with 80.9% on time and SkyWest Airlines was last with 74.2%.
Over 24 months, Saturday was the most reliable day (84% on time) and July the worst month (71%).
The cancellation rate was 2.1% (US average 1.8%).
COS to ORD 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 |
|---|---|---|---|---|
| United Airlines | 80.9% | 67 min | 2.2% | 180 |
| SkyWest Airlines | 74.2% | 131 min | 2.1% | 821 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly COS to ORD
On-time arrival % by scheduled departure hour (local time), 1,702 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 91.4% | 5.4% | 37 |
| 6am–7am | 90.0% | 0.3% | 332 |
| 7am–8am | Limited data | 1 | |
| 8am–9am | 83.9% | 3.1% | 32 |
| 9am–10am | 82.1% | 0.6% | 163 |
| 11am–12pm | 78.1% | 1.5% | 131 |
| 12pm–1pm | 74.6% | 1.8% | 878 |
| 1pm–2pm | 81.6% | 0.8% | 126 |
| 2pm–3pm | Limited data | 2 | |
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 ORD
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 | 32 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 79.4% | -2.1 pts | 0.0% | 68 |
| Summer peak (Jun 15 - Aug 15) | 74.5% | -7.0 pts | 2.2% | 357 |
| All other days | 81.5% | — | 1.0% | 1,245 |
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).