Skip to content
WanderNerd
Check a flight

Route Reliability

GSO → Philadelphia

GSO–PHL · 365 miles · GSO Airport to Philadelphia International Airport

87
Pretty Reliable
WanderNerd Reliability Score
88%
Arrive within 15 minutes
4 min early
Average arrival delay
2.2%
Cancelled
1,114
Flights in the data

Data through May 2026.

American Airlines is the only airline in this data on this route, arriving on time 88% of the time across 1,114 flights. No comparison to make.

What the data says

The 12–3 PM departure wins.

GSO–PHL flights departing between 12–3 PM arrived on time 92% of the time, versus 76% between 3–6 PM.

Tuesday comes out ahead.

A small edge: 90% on time on Tuesdays against 84% on Sundays.

Ticking up lately.

GSO–PHL flights arrived on time 92% of the time over the last three months in the data, compared with 87% 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
  • Mon89%(158 flights)
  • Tue90%(153 flights)
  • Wed87%(155 flights)
  • Thu89%(159 flights)
  • Fri87%(159 flights)
  • Sat88%(146 flights)
  • Sun84%(160 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM92%(356 flights)
  • 9 AM–12 PM91%(276 flights)
  • 12–3 PM92%(169 flights)
  • 3–6 PM76%(37 flights)
  • 6–9 PM77%(251 flights)
On-time trend by month
91%
May

Jun 79% → May 91% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202579%85
July 202582%88
August 202583%89
September 202587%75
October 202586%109
November 202595%86
December 202581%89
January 202693%85
February 202687%75
March 202690%86
April 202696%114
May 202691%109

Keep nerding

Based on 1,114 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.