GSP to PHL flight delays & on-time performance
Nonstop flights from Greenville-Spartanburg International Airport to Philadelphia International Airport · 515 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at GSP or PHL right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Greer (GSP) to Philadelphia (PHL) arrived on time 89% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2% were cancelled, and 5% arrived an hour or more late.
- Departures scheduled around 12pm did best (100% on time); around 11am did worst (70%).
- Tuesday was the most reliable day to fly (91% on time) and Sunday the least (87%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (74%).
Which airline is most on time from GSP to PHL?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| American Airlines | 100% | 0.0% | 0 min | 0.0% | 1 |
| PSA AirlinesRegional airline operating American Eagle flights. | 89% | 2.0% | 11 min | 4.9% | 440 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am76%18 flights
- 6am90%178 flights
- 7am95%111 flights
- 8am77%56 flights
- 10am95%19 flights
- 11am70%25 flights
- 12pm100%22 flights
- 2pm100%11 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday88%6.3% cancelled
- Tuesday91%3.4% cancelled
- Wednesday88%0.0% cancelled
- Thursday89%0.0% cancelled
- Friday88%1.5% cancelled
- Saturday89%0.0% cancelled
- Sunday87%3.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Airline (crew, maintenance, cleaning, fueling)74%
- Late-arriving aircraft15%
- Air traffic control & airport congestion8%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather78%
- Airline (crew, maintenance, cleaning, fueling)22%
- Air traffic control & airport congestion0%
- Security0%
GSP to PHL: common questions
- How often are GSP to PHL flights on time?
- 89% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Greer to Philadelphia cancelled?
- 2.0% of scheduled flights were cancelled (9 of 441).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 90 min behind schedule on average, and 4.9% of flights were an hour or more late.
- How long is taxi time at GSP?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: PHL to GSP — 71% on time
More flights from Greer
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: GSP → PHL, nonstop flights by US airlines that report to the DOT. How we calculate this.