Greer (GSP) to Philadelphia (PHL): On-Time Performance
Data through July 2026
Greer (GSP) to Philadelphia (PHL) effectively runs on two schedules. In October 2024, 100% of arrivals were on time; in July 2024 that fell to 68% — a 32-point seasonal swing. Across the full period the route averages 86% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 73%), which matters most in the rough months.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 2.9%
- Flights/day
- 1.2
- last 12 months
- Duration
- 1h 50m
- scheduled
- Distance
- 515 mi
Best airline from GSP to PHL
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| PSA Airlinesmost reliable | 87% | 15 min | 2.2% | 907 |
| Republic Airways | 71% | 20 min | 12.5% | 64 |
Monthly on-time trend
Best time to fly from GSP to PHL
Aim for departures around 6 a.m. (91% on-time); avoid 6 p.m. departures (73%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 14 min |
| Tuesday | 88% | 9 min |
| Wednesday | 85% | 24 min |
| Thursday | 86% | 16 min |
| Friday | 84% | 14 min |
| Saturday | 83% | 19 min |
| Sundaybest | 88% | 9 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft29%
- Airline operations58%
- National airspace system9%
- Weather4%
Frequently asked questions
- How often are flights from GSP to PHL delayed?
- 14% of GSP–PHL 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 15 minutes.
- Which airline is most reliable from GSP to PHL?
- PSA Airlines has the best on-time record on this route at 87%, based on 907 flights. 2 airlines flew GSP–PHL frequently enough to compare in this period.
- What is the best time of day to fly from GSP to PHL?
- Departures around 6 a.m. have the best record (91% on-time), while departures around 6 p.m. have the worst (73%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GSP to PHL?
- The scheduled GSP–PHL flight time averages 1h 50m over 515 miles. Actual arrival times vary — flights on this route land 15+ minutes late 14% of the time.
- How often are GSP to PHL flights cancelled?
- 2.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from GSP to PHL?
- July 2024 was the roughest month in this dataset, with only 68% of arrivals on time. The best was October 2024 at 100%. If your dates are flexible, that 32-point gap is worth planning around.
Explore related pages
More routes from GSP
Other ways to fly to Philadelphia (PHL)
Related guides
Based on 972 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.