Miami (MIA) to Greer (GSP): On-Time Performance
Data through May 2026
When you fly MIA to GSP matters as much as anything else about the booking: the route swung from 95% on-time in November 2024 to just 61% in June 2024. Across the full period the route averages 81% on-time against a national 78%.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 2.0
- last 12 months
- Duration
- 2h 2m
- scheduled
- Distance
- 637 mi
Monthly on-time trend
Best time to fly from MIA to GSP
Aim for departures around 1 p.m. (96% on-time); avoid 10 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 6 min |
| Tuesdaybest | 87% | 6 min |
| Wednesday | 87% | 8 min |
| Thursday | 78% | 14 min |
| Friday | 78% | 13 min |
| Saturday | 80% | 10 min |
| Sunday | 73% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft49%
- Airline operations22%
- National airspace system27%
- Weather2%
Frequently asked questions
- How often are flights from MIA to GSP delayed?
- 19% of MIA–GSP flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 minutes.
- What is the best time of day to fly from MIA to GSP?
- Departures around 1 p.m. have the best record (96% on-time), while departures around 10 p.m. have the worst (74%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from MIA to GSP?
- The scheduled MIA–GSP flight time averages 2h 2m over 637 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are MIA to GSP flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from MIA to GSP?
- June 2024 was the roughest month in this dataset, with only 61% of arrivals on time. The best was November 2024 at 95%. If your dates are flexible, that 34-point gap is worth planning around.
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Based on 1,262 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.