Best Time to Fly CHS to MDW: On-Time Stats by Hour & Airline
Charleston AFB/International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
370 flights were scheduled from Charleston (CHS) to Chicago (MDW) in the last 12 months, and 81.3% of those that flew arrived on time, 3.7 points above the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (93% on time) and Sunday the weakest day of the week (79%).
0.5% of flights were cancelled, versus 1.8% nationally.
CHS 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 | 81.3% | 52 min | 0.5% | 370 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CHS to MDW
On-time arrival % by scheduled departure hour (local time), 725 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.6% | 0.9% | 110 |
| 6am–7am | 93.7% | 0.0% | 126 |
| 7am–8am | 95.5% | 1.3% | 159 |
| 8am–9am | 92.8% | 1.4% | 70 |
| 10am–11am | Limited data | 16 | |
| 1pm–2pm | Limited data | 5 | |
| 2pm–3pm | Limited data | 2 | |
| 3pm–4pm | Limited data | 15 | |
| 4pm–5pm | Limited data | 22 | |
| 5pm–6pm | 56.9% | 0.0% | 54 |
| 6pm–7pm | 73.6% | 0.0% | 53 |
| 7pm–8pm | 63.6% | 0.0% | 66 |
| 8pm–9pm | Limited data | 27 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CHS 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 | 22 | ||
| Summer peak (Jun 15 - Aug 15) | 84.8% | -1.9 pts | 1.7% | 175 |
| All other days | 86.7% | — | 0.4% | 515 |
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).