Chicago (MDW) to Charleston (CHS): On-Time Performance
Data through July 2026
The calendar drives reliability on MDW–CHS. October 2024 flights landed on schedule 97% of the time, but June 2026 dropped to 52% — a gap of 45 points. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 65%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 4m
- scheduled
- Distance
- 745 mi
Monthly on-time trend
Best time to fly from MDW to CHS
Aim for departures around 8 a.m. (90% on-time); avoid 9 p.m. departures (60%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 19 min |
| Tuesday | 73% | 16 min |
| Wednesday | 76% | 13 min |
| Thursday | 72% | 20 min |
| Fridaybest | 83% | 11 min |
| Saturday | 81% | 13 min |
| Sunday | 75% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft57%
- Airline operations32%
- National airspace system11%
- Security1%
Frequently asked questions
- How often are flights from MDW to CHS delayed?
- 24% of MDW–CHS flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- What is the best time of day to fly from MDW to CHS?
- Departures around 8 a.m. have the best record (90% on-time), while departures around 9 p.m. have the worst (60%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MDW to CHS?
- The scheduled MDW–CHS flight time averages 2h 4m over 745 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are MDW to CHS flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from MDW to CHS?
- June 2026 was the roughest month in this dataset, with only 52% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 45-point gap is worth planning around.
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Related guides
Based on 761 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.