Route on-time record
PHL to GSP: most on-time flights and the best time to fly
Philadelphia (Philadelphia International Airport) to Greenville/Greer/Spartanburg (Greenville-Spartanburg International Airport). 445 nonstop flights in Jun 2025 to May 2026, 71% arrived within 15 minutes and 3.4% were cancelled. The most reliable flight number was PSA 5058 at 5:35 PM.
Flying on a specific date? We’ll adjust for the month, the weekday and the forecast.
PHL → GSP
Philadelphia to Greenville/Greer/Spartanburg: 445 nonstop flights a year
On time (12 months)
71%
Cancelled
3.4%
avg delay 27 min
Best time to leave
9 AM to noon
97% on time vs 66% 6 to 9 PM
Most reliable airline
PSA
68% 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 5058 · sold as American Eagle
5:35 PM → 7:38 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-20.
69%
chance on time
- On time (history)
- 71%
- Cancelled
- 0.0%
- Avg arrival delay
- 24 min
- Arrived on time 71% of the time (48 flights, Jun 2025 to May 2026).
- Never cancelled in 48 scheduled flights.
- Departs inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
- Short track record (48 flights), so its score leans on the airline's record at this hour.
Limited track record · 48 flights
Find 5:35 PM flight fares Opens this date on Aviasales#2 · PSA 5618 · sold as American Eagle
6:43 PM → 8:46 PM2h 03m nonstop
Local times, typical schedule. Last flown 2026-05-31.
64%
chance on time
- On time (history)
- 66%
- Cancelled
- 4.4%
- Avg arrival delay
- 33 min
- Arrived on time 66% of the time (301 flights, Jun 2025 to May 2026).
- Cancelled 4.4% of the time (14 of 316).
- Leaves in this route's least on-time window (6 to 9 PM: 66% on time; 9 AM to noon: 97%).
- Departs inside PHL's trouble window: 72% of its 95 ground stops and delay programs started between 2 PM and 8 PM.
Strong track record · 301 flights
Find 6:43 PM 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)68%
445 flights · 71% on time as flown · 3.4% cancel
On time by departure time
All airlines, scheduled local departure, Jun 2025 to May 2026.
- Before 9 AM79%
43 flights · avg delay 13 min
- 9 AM to noon97%
33 flights · avg delay 1 min
- 3 to 6 PM71%
79 flights · avg delay 20 min
- 6 to 9 PM66%
289 flights · avg delay 34 min
Best day: Wednesday (82%). Worst: Saturday (68%).
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
- Late-arriving aircraft50%
- Airline (crew, maintenance, boarding)26%
- Air traffic control and airport volume19%
- Severe weather4%
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
PHL to GSP questions
- What time of day is best to fly PHL to GSP?
- 9 AM to noon: 97% of flights arrived on time, against 66% for departures 6 to 9 PM.
- Which airline is most on time from PHL to GSP?
- PSA, with a season-adjusted 68% chance of operating and arriving on time over 445 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 PHL to GSP?
- July (60% on time); the best was October (86%), 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 PHL
- GSP to PHL (return)
- PHL to ATL 78%
- PHL to MCO 72%
- PHL to BOS 75%
- PHL to ORD 72%
- PHL to CLT 80%
- PHL to DFW 77%
- PHL to FLL 72%
- PHL to MIA 77%
- PHL to DEN 76%
- PHL to DTW 80%
- PHL to BNA 75%
- PHL to TPA 73%
Live status: FAA delays and ground stops