Atlanta (ATL) to Charleston (CHS): On-Time Performance
Data through July 2026
Atlanta (ATL) to Charleston (CHS) effectively runs on two schedules. In September 2025, 93% of arrivals were on time; in July 2024 that fell to 55% — a 38-point seasonal swing. Across the full period the route averages 81% on-time against a national 78%. Morning departures also hold up better than evening ones (90% vs 76%), which matters most in the rough months.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 8.8
- last 12 months
- Duration
- 1h 10m
- scheduled
- Distance
- 259 mi
Monthly on-time trend
Best time to fly from ATL to CHS
Aim for departures around 9 a.m. (94% on-time); avoid 3 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 13 min |
| Tuesday | 86% | 9 min |
| Wednesdaybest | 87% | 6 min |
| Thursday | 82% | 10 min |
| Friday | 77% | 15 min |
| Saturday | 82% | 11 min |
| Sunday | 75% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft26%
- Airline operations52%
- National airspace system17%
- Weather5%
Frequently asked questions
- How often are flights from ATL to CHS delayed?
- 19% of ATL–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 12 minutes.
- What is the best time of day to fly from ATL to CHS?
- Departures around 9 a.m. have the best record (94% on-time), while departures around 3 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to CHS?
- The scheduled ATL–CHS flight time averages 1h 10m over 259 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are ATL to CHS flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from ATL to CHS?
- July 2024 was the roughest month in this dataset, with only 55% of arrivals on time. The best was September 2025 at 93%. If your dates are flexible, that 38-point gap is worth planning around.
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Based on 6,457 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.