Greer (GSP) to Philadelphia (PHL): On-Time Performance
Data through May 2026
The biggest risk when flying GSP to PHL isn't a late arrival — it's not departing at all. 3% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 86% land on time, no worse than the national average of 78%. PSA Airlines has been the safer pick, arriving on time 87% of the time.
- On-time
- 86%
- arrived <15 min late
- Avg delay
- 14 min
- completed flights
- Cancelled
- 3.0%
- 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 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| PSA Airlinesmost reliable | 87% | 14 min | 2.3% | 884 |
| Republic Airways | 74% | 18 min | 10.5% | 86 |
Monthly on-time trend
Best time to fly from GSP to PHL
Aim for departures around 7 a.m. (92% on-time); avoid 6 p.m. departures (74%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 87% | 13 min |
| Tuesday | 87% | 10 min |
| Wednesday | 85% | 24 min |
| Thursday | 87% | 15 min |
| Friday | 84% | 14 min |
| Saturday | 85% | 13 min |
| Sundaybest | 89% | 8 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft31%
- Airline operations54%
- National airspace system10%
- Weather5%
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 2024-06 and 2026-05. The average arrival delay across completed flights was 14 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 884 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 7 a.m. have the best record (92% on-time), while departures around 6 p.m. have the worst (74%). 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?
- 3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- 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.
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Based on 971 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.