Skip to content
WanderNerd
Check a flight

Route Reliability

Greenville → Philadelphia

GSP–PHL · 515 miles · Greenville–Spartanburg International Airport to Philadelphia International Airport

80
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
3.1%
Cancelled
1,041
Flights in the data

Data through May 2026.

American Airlines is the only airline in this data on this route, arriving on time 85% of the time across 1,041 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

GSP–PHL flights departing between 12–3 PM arrived on time 90% of the time, versus 77% between 3–6 AM.

Skip Monday if you can.

GSP–PHL flights arrived on time 90% of the time on Tuesdays. On Mondays: 80%.

Keep a backup plan handy.

This route was cancelled 3.1% of the time. Typical for U.S. flights is around 1–2%.

Trending in the right direction.

GSP–PHL flights arrived on time 91% of the time over the last three months in the data, compared with 82% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon80%(149 flights)
  • Tue90%(133 flights)
  • Wed89%(141 flights)
  • Thu83%(151 flights)
  • Fri84%(150 flights)
  • Sat86%(133 flights)
  • Sun82%(151 flights)
On-time by departure window
  • 3–6 AM77%(17 flights)
  • 6–9 AM89%(339 flights)
  • 9 AM–12 PM86%(292 flights)
  • 12–3 PM90%(100 flights)
  • 3–6 PM—(5 flights)
  • 6–9 PM77%(255 flights)
On-time trend by month
92%
May

Jun 76% → May 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%83
July 202570%83
August 202577%91
September 202597%94
October 202587%110
November 202593%81
December 202579%84
January 202677%79
February 202690%61
March 202690%60
April 202691%84
May 202692%98

Keep nerding

Based on 1,041 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.