Miami (MIA) to Charleston (CHS): On-Time Performance
Data through July 2026
Miami (MIA) to Charleston (CHS) effectively runs on two schedules. In October 2024, 93% of arrivals were on time; in March 2025 that fell to 50% — a 43-point seasonal swing. Across the full period the route averages 69% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 63%), which matters most in the rough months.
- On-time
- 69%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 2.8
- last 12 months
- Duration
- 1h 48m
- scheduled
- Distance
- 489 mi
Best airline from MIA to CHS
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Airmost reliable | 80% | 12 min | 1.8% | 227 |
| American Airlines | 67% | 28 min | 1.4% | 1,664 |
Monthly on-time trend
Best time to fly from MIA to CHS
Aim for departures around 7 a.m. (87% on-time); avoid 10 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 70% | 23 min |
| Tuesdaybest | 79% | 16 min |
| Wednesday | 78% | 16 min |
| Thursday | 67% | 27 min |
| Friday | 65% | 29 min |
| Saturday | 71% | 25 min |
| Sunday | 54% | 41 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations38%
- National airspace system11%
- Weather5%
Frequently asked questions
- How often are flights from MIA to CHS delayed?
- 31% of MIA–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 26 minutes.
- Which airline is most reliable from MIA to CHS?
- Envoy Air has the best on-time record on this route at 80%, based on 227 flights. 2 airlines flew MIA–CHS frequently enough to compare in this period.
- What is the best time of day to fly from MIA to CHS?
- Departures around 7 a.m. have the best record (87% on-time), while departures around 10 p.m. have the worst (59%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to CHS?
- The scheduled MIA–CHS flight time averages 1h 48m over 489 miles. Actual arrival times vary — flights on this route land 15+ minutes late 31% of the time.
- How often are MIA to CHS flights cancelled?
- 1.5% 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 MIA to CHS?
- March 2025 was the roughest month in this dataset, with only 50% of arrivals on time. The best was October 2024 at 93%. If your dates are flexible, that 43-point gap is worth planning around.
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Based on 1,911 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.