Best Time to Fly MDW to CHS: On-Time Stats by Hour & Airline
Chicago Midway International → Charleston AFB/International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.3% of Chicago (MDW) to Charleston (CHS) flights arrived on time (367 scheduled flights). That is 3.3 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Friday was the most reliable day (83% on time) and June the worst month (61%).
The cancellation rate was 1.4% (US average 1.8%).
MDW to CHS 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 | 74.3% | 53 min | 1.4% | 367 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to CHS
On-time arrival % by scheduled departure hour (local time), 722 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 89.5% | 0.0% | 67 |
| 9am–10am | Limited data | 24 | |
| 10am–11am | Limited data | 15 | |
| 11am–12pm | Limited data | 8 | |
| 12pm–1pm | 84.2% | 2.6% | 39 |
| 1pm–2pm | 86.1% | 0.0% | 101 |
| 2pm–3pm | 79.5% | 2.2% | 45 |
| 3pm–4pm | 84.4% | 0.0% | 64 |
| 4pm–5pm | 83.3% | 0.0% | 60 |
| 5pm–6pm | 70.0% | 3.2% | 31 |
| 6pm–7pm | 68.8% | 1.2% | 81 |
| 7pm–8pm | 64.0% | 1.7% | 116 |
| 8pm–9pm | Limited data | 27 | |
| 9pm–10pm | 62.8% | 2.3% | 44 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to CHS
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) | 64.3% | -16.6 pts | 2.3% | 172 |
| All other days | 80.9% | — | 0.6% | 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).