Greer (GSP) to Miami (MIA): On-Time Performance
Data through July 2026
The calendar drives reliability on GSP–MIA. August 2024 flights landed on schedule 100% of the time, but January 2026 dropped to 60% — a gap of 40 points. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 69%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 0.9%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 57m
- scheduled
- Distance
- 637 mi
Monthly on-time trend
Best time to fly from GSP to MIA
Aim for departures around 5 a.m. (91% on-time); avoid 8 p.m. departures (59%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 86% | 11 min |
| Tuesdaybest | 87% | 10 min |
| Wednesday | 83% | 13 min |
| Thursday | 81% | 15 min |
| Friday | 81% | 9 min |
| Saturday | 78% | 14 min |
| Sunday | 83% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations46%
- National airspace system14%
- Weather2%
Frequently asked questions
- How often are flights from GSP to MIA delayed?
- 18% of GSP–MIA 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 GSP to MIA?
- Departures around 5 a.m. have the best record (91% on-time), while departures around 8 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 GSP to MIA?
- The scheduled GSP–MIA flight time averages 1h 57m over 637 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are GSP to MIA flights cancelled?
- 0.9% 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 GSP to MIA?
- January 2026 was the roughest month in this dataset, with only 60% of arrivals on time. The best was August 2024 at 100%. If your dates are flexible, that 40-point gap is worth planning around.
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Based on 1,357 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.