Route on-time record
GSP to PHL: most on-time flights and the best time to fly
Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport) to Philadelphia (Philadelphia International Airport). 445 nonstop flights in Jun 2025 to May 2026, 88% arrived within 15 minutes and 2.0% were cancelled. The most reliable flight number was PSA 5130 at 7:00 AM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
GSP → PHL
Greenville/Greer/Spartanburg to Philadelphia: 445 nonstop flights a year
On time (12 months)
88%
Cancelled
2.0%
avg delay 9 min
Best time to leave
Noon to 3 PM
100% on time vs 81% 9 AM to noon
Most reliable airline
PSA
86% chance on time
Fares open on our travel partner (Aviasales). Pick the flight number you chose here.
Most reliable nonstop flights
Ranked by the chance the flight operates and arrives within 15 minutes of schedule, from Jun 2025 to May 2026 records.
#1 · PSA 5130 · sold as American Eagle
7:00 AM → 8:53 AM1h 53m nonstop
Local times, typical schedule. Last flown 2026-05-31.
88%
chance on time
- On time (history)
- 90%
- Cancelled
- 0.0%
- Avg arrival delay
- 7 min
- Arrived on time 90% of the time (154 flights, Jun 2025 to May 2026).
- Never cancelled in 154 scheduled flights.
Moderate track record · 154 flights
Find 7:00 AM flight fares Opens this date on Aviasales#2 · PSA 5621 · sold as American Eagle
6:00 AM → 7:53 AM1h 53m nonstop
Local times, typical schedule. Last flown 2026-04-06.
85%
chance on time
- On time (history)
- 87%
- Cancelled
- 3.3%
- Avg arrival delay
- 11 min
- Arrived on time 87% of the time (202 flights, Jun 2025 to May 2026).
- Cancelled 3.3% of the time (7 of 209).
Strong track record · 202 flights
Find 6:00 AM flight fares Opens this date on Aviasales
Airlines on this route
Season-adjusted chance of operating and arriving on time.
- PSA Airlines (sold as American Eagle)86%
444 flights · 88% on time as flown · 2.0% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM88%
363 flights · avg delay 9 min
- 9 AM to noon81%
45 flights · avg delay 12 min
- Noon to 3 PM100%
33 flights · avg delay 1 min
On time by month
All airlines, Jun 2023 to May 2026. Several years per month, so one stormy season doesn't define a month. Travel-month estimates use this seasonal pattern.
What delays this route
- Airline (crew, maintenance, boarding)73%
- Late-arriving aircraft12%
- Air traffic control and airport volume11%
- Severe weather3%
Share of delay minutes by the cause airlines report to the US DOT.
Historical odds, not a guarantee. Built from the US DOT Bureau of Transportation Statistics on-time reports (Jun 2025 to May 2026), FAA ground stop and delay program advisories, and 20 years of airport weather observations. Covers US airlines that report to the DOT; schedules are flights operated recently, so confirm times when you book. ATIS Alerts is not affiliated with any airline. Fares are what Aviasales travelers saw in recent searches (USD, one way, 1 adult), not live quotes; the partner site shows the current price. Fare links go to our travel partner and may earn us a commission at no cost to you. Affiliate disclosure
GSP to PHL questions
- What time of day is best to fly GSP to PHL?
- Noon to 3 PM: 100% of flights arrived on time, against 81% for departures 9 AM to noon.
- Which airline is most on time from GSP to PHL?
- PSA, with a season-adjusted 86% chance of operating and arriving on time over 444 flights. The adjustment compares each airline with what the route did in the months it flew, so a carrier that skipped a stormy month gets no free credit.
- What is the worst month for delays on GSP to PHL?
- July (78% on time); the best was October (97%), averaged over Jun 2023 to May 2026.
- Is this a prediction for my flight?
- No. These are historical odds from the US DOT on-time reports, FAA advisories and airport weather records. Check your flight status and the FAA delay board on the day you fly.
More routes from GSP
- PHL to GSP (return)
- GSP to ATL 89%
- GSP to ORD 75%
- GSP to CLT 83%
- GSP to DFW 74%
- GSP to DCA 68%
- GSP to LGA 76%
- GSP to EWR 86%
- GSP to MIA 80%
- GSP to BWI 89%
- GSP to DTW 85%
- GSP to BNA 89%
- GSP to DEN 79%
Live status: FAA delays and ground stops