Best Time to Fly GSP to PHL: On-Time Stats by Hour & Airline
Greenville-Spartanburg International → Philadelphia International
Data through July 2026 · Last updated October 18, 2026
441 flights were scheduled from Greer (GSP) to Philadelphia (PHL) in the last 12 months, and 88.7% of those that flew arrived on time, 11.0 points above the US average of 77.6%.
PSA Airlines was the only reporting airline with regular flights on this route.
October has been the best month (97% on time) and Friday the weakest day of the week (84%).
2.0% of flights were cancelled, versus 1.8% nationally.
GSP to PHL 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 |
|---|---|---|---|---|
| PSA Airlines | 88.6% | 90 min | 2.0% | 440 |
| American Airlines | Limited data | 1 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly GSP to PHL
On-time arrival % by scheduled departure hour (local time), 911 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 20 | |
| 6am–7am | 91.2% | 2.6% | 232 |
| 7am–8am | 91.1% | 1.8% | 274 |
| 8am–9am | 83.6% | 1.0% | 197 |
| 9am–10am | Limited data | 1 | |
| 10am–11am | Limited data | 21 | |
| 11am–12pm | Limited data | 28 | |
| 12pm–1pm | Limited data | 22 | |
| 2pm–3pm | Limited data | 11 | |
| 6pm–7pm | 73.7% | 9.5% | 105 |
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 PHL
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 | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 29 | ||
| Summer peak (Jun 15 - Aug 15) | 80.6% | -7.6 pts | 3.6% | 139 |
| All other days | 88.2% | — | 2.7% | 729 |
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).