Best Time to Fly COS to MDW: On-Time Stats by Hour & Airline
City of Colorado Springs Municipal → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
189 flights were scheduled from Colorado Springs (COS) to Chicago (MDW) in the last 12 months, and 75.0% of those that flew arrived on time, 2.6 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
October has been the best month (95% on time) and Thursday the weakest day of the week (70%).
1.1% of flights were cancelled, versus 1.8% nationally.
COS to MDW 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 |
|---|---|---|---|---|
| Southwest Airlines | 75.0% | 46 min | 1.1% | 189 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly COS to MDW
On-time arrival % by scheduled departure hour (local time), 579 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 2 | |
| 7am–8am | Limited data | 2 | |
| 8am–9am | Limited data | 15 | |
| 9am–10am | 85.7% | 0.0% | 65 |
| 10am–11am | Limited data | 21 | |
| 11am–12pm | 84.3% | 1.4% | 72 |
| 12pm–1pm | 83.1% | 1.2% | 84 |
| 1pm–2pm | 77.6% | 0.0% | 76 |
| 2pm–3pm | 70.5% | 0.0% | 107 |
| 3pm–4pm | 78.8% | 1.7% | 120 |
| 4pm–5pm | Limited data | 15 | |
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 MDW
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 | 13 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 26 | ||
| Summer peak (Jun 15 - Aug 15) | 69.4% | -12.5 pts | 0.6% | 162 |
| All other days | 81.9% | — | 0.3% | 378 |
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).