Best Time to Fly PHL to GSP: On-Time Stats by Hour & Airline
Philadelphia International → Greenville-Spartanburg International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.2% of Philadelphia (PHL) to Greer (GSP) flights arrived on time (441 scheduled flights). That is 6.4 points below the national average of 77.6%.
PSA Airlines was the only reporting airline with regular flights on this route.
September has been the best month (80% on time) and Saturday the weakest day of the week (59%).
3.0% of flights were cancelled, versus 1.8% nationally.
PHL to GSP 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 | 71.2% | 92 min | 3.0% | 441 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly PHL to GSP
On-time arrival % by scheduled departure hour (local time), 910 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 78.6% | 2.3% | 43 |
| 10am–11am | 97.1% | 0.0% | 34 |
| 1pm–2pm | Limited data | 1 | |
| 3pm–4pm | 76.7% | 3.2% | 93 |
| 4pm–5pm | 57.6% | 2.9% | 34 |
| 5pm–6pm | 55.4% | 2.6% | 115 |
| 6pm–7pm | 64.8% | 3.6% | 497 |
| 7pm–8pm | 68.9% | 2.1% | 93 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on PHL to GSP
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) | 45.4% | -25.0 pts | 5.8% | 139 |
| All other days | 70.4% | — | 2.5% | 728 |
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).