Best Time to Fly GSP to MIA: On-Time Stats by Hour & Airline
Greenville-Spartanburg International → Miami International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.2% of Greer (GSP) to Miami (MIA) flights arrived on time (726 scheduled flights). That is 2.6 points above the national average of 77.6%.
Envoy Air was the only reporting airline with regular flights on this route.
September has been the best month (95% on time) and Saturday the weakest day of the week (78%).
1.2% of flights were cancelled, versus 1.8% nationally.
GSP to MIA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Envoy Air | 80.4% | 63 min | 1.0% | 701 |
| Republic Airways | Limited data | 25 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GSP to MIA
On-time arrival % by scheduled departure hour (local time), 1,326 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.0% | 0.6% | 313 |
| 6am–7am | 90.5% | 0.3% | 329 |
| 7am–8am | 81.0% | 3.5% | 87 |
| 10am–11am | Limited data | 15 | |
| 11am–12pm | Limited data | 29 | |
| 12pm–1pm | Limited data | 11 | |
| 1pm–2pm | Limited data | 3 | |
| 4pm–5pm | 83.9% | 0.0% | 93 |
| 5pm–6pm | Limited data | 9 | |
| 6pm–7pm | 78.0% | 2.2% | 181 |
| 7pm–8pm | 71.8% | 0.9% | 111 |
| 8pm–9pm | 58.6% | 0.0% | 145 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on GSP to MIA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 28 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 75.0% | -9.3 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 75.1% | -9.2 pts | 0.0% | 245 |
| All other days | 84.3% | — | 1.2% | 993 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).