BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
GSP→PHL

Greer, SC (GSP) to Philadelphia, PA (PHL) flight delay odds

87.1% of 441 official scheduled GSP-to-PHL flights arrived on time; 6.8% arrived at least 30 minutes late and 2.0% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
87.1%arrived on time
6.8%30+ min late
2.0%cancelled
441scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.9%all scheduled flights
120+ minutes late2.3%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-4.4 mincompleted flights

Which departure time was most reliable for GSP to PHL?

Among qualifying GSP-to-PHL departure window results, Early morning had the highest on-time rate: 87.1% of 363 flights. Late morning was lowest at 77.8% across 45 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36387.1%7.2%1.9%
Late morning4577.8%8.9%4.4%

Which weekday was most reliable for GSP to PHL?

Among qualifying GSP-to-PHL weekday results, Saturday had the highest on-time rate: 91.2% of 57 flights. Monday was lowest at 81.2% across 64 flights.

DayFlightsOn time30+ minCancelled
Monday6481.2%10.9%6.2%
Tuesday6088.3%5.0%3.3%
Wednesday6587.7%7.7%0.0%
Thursday6590.8%4.6%0.0%
Friday6586.2%9.2%1.5%
Saturday5791.2%5.3%0.0%
Sunday6584.6%4.6%3.1%

Which airline was most reliable for GSP to PHL?

Only PSA Airlines met the GSP-to-PHL airline threshold: 87.0% of 440 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
PSA Airlines44087.0%6.8%2.0%
American Airlines1100.0%0.0%0.0%

Which month was most reliable for GSP to PHL?

Among qualifying GSP-to-PHL month results, September 2025 had the highest on-time rate: 97.4% of 76 flights. January 2026 was lowest at 69.4% across 49 flights.

MonthFlightsOn time30+ minCancelled
July 20253177.4%12.9%0.0%
August 20253183.9%9.7%0.0%
September 20257697.4%1.3%0.0%
October 20253694.4%2.8%0.0%
November 20253086.7%6.7%3.3%
December 20253177.4%12.9%3.2%
January 20264969.4%12.2%8.2%
February 20263582.9%14.3%2.9%
March 20263190.3%3.2%6.5%
April 20263093.3%3.3%0.0%
May 20263196.8%0.0%0.0%
June 20263090.0%6.7%0.0%

What drove GSP to PHL delay minutes?

Airline was the largest recorded GSP-to-PHL delay category, accounting for 74.5% of 3,950 BTS-attributed delay minutes during July 2025–June 2026.

Airline74.5%
Late aircraft13.5%
National airspace9.2%
Weather2.9%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.