Philadelphia (PHL) to Greer (GSP): On-Time Performance
Data through May 2026
Philadelphia (PHL) to Greer (GSP) effectively runs on two schedules. In April 2026, 90% of arrivals were on time; in June 2025 that fell to 39% — a 51-point seasonal swing. Across the full period the route averages 70% on-time against a national 78%.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 26 min
- completed flights
- Cancelled
- 2.8%
- Flights/day
- 1.2
- last 12 months
- Duration
- 1h 58m
- scheduled
- Distance
- 515 mi
Best airline from PHL to GSP
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 77% | 13 min | 3.5% | 85 |
| PSA Airlines | 69% | 28 min | 2.7% | 885 |
Monthly on-time trend
Best time to fly from PHL to GSP
Aim for departures around 10 a.m. (97% on-time); avoid 4 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 30 min |
| Tuesday | 74% | 21 min |
| Wednesdaybest | 79% | 15 min |
| Thursday | 65% | 31 min |
| Friday | 68% | 30 min |
| Saturday | 61% | 23 min |
| Sunday | 64% | 35 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations29%
- National airspace system20%
- Weather9%
Frequently asked questions
- How often are flights from PHL to GSP delayed?
- 30% of PHL–GSP 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 26 minutes.
- Which airline is most reliable from PHL to GSP?
- Republic Airways has the best on-time record on this route at 77%, based on 85 flights. 2 airlines flew PHL–GSP frequently enough to compare in this period.
- What is the best time of day to fly from PHL to GSP?
- Departures around 10 a.m. have the best record (97% on-time), while departures around 4 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHL to GSP?
- The scheduled PHL–GSP flight time averages 1h 58m over 515 miles. Actual arrival times vary — flights on this route land 15+ minutes late 30% of the time.
- How often are PHL to GSP flights cancelled?
- 2.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from PHL to GSP?
- June 2025 was the roughest month in this dataset, with only 39% of arrivals on time. The best was April 2026 at 90%. If your dates are flexible, that 51-point gap is worth planning around.
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Based on 970 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.