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

Atlanta, GA (ATL) to Philadelphia, PA (PHL) flight delay odds

72.7% of 5,713 official scheduled ATL-to-PHL flights arrived on time; 16.5% arrived at least 30 minutes late and 2.8% 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 SIGNALVariable
72.7%arrived on time
16.5%30+ min late
2.8%cancelled
5,713scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.8%all scheduled flights
120+ minutes late3.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+12.1 mincompleted flights

Which departure time was most reliable for ATL to PHL?

Among qualifying ATL-to-PHL departure window results, Early morning had the highest on-time rate: 85.3% of 1,062 flights. Night was lowest at 61.7% across 639 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,06285.3%6.5%2.7%
Late morning1,15579.7%11.5%3.2%
Afternoon1,78769.2%18.5%2.7%
Evening1,07064.8%23.4%2.3%
Night63961.7%25.4%3.6%

Which weekday was most reliable for ATL to PHL?

Among qualifying ATL-to-PHL weekday results, Wednesday had the highest on-time rate: 78.5% of 768 flights. Sunday was lowest at 64.4% across 868 flights.

DayFlightsOn time30+ minCancelled
Monday88266.8%20.0%3.7%
Tuesday78676.7%15.1%1.8%
Wednesday76878.5%12.2%0.8%
Thursday86772.0%18.0%1.7%
Friday87075.7%14.4%2.5%
Saturday67276.5%14.9%3.0%
Sunday86864.4%20.2%6.0%

Which airline was most reliable for ATL to PHL?

Among qualifying ATL-to-PHL airline results, Republic Airways had the highest on-time rate: 87.2% of 156 flights. Frontier Airlines was lowest at 60.4% across 1,010 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines3,02874.1%14.3%2.5%
Frontier Airlines1,01060.4%27.2%3.0%
PSA Airlines83477.7%12.4%4.6%
American Airlines59276.4%16.6%2.0%
Republic Airways15687.2%7.1%3.8%
Spirit Airlines9364.5%26.9%1.1%

Which month was most reliable for ATL to PHL?

Among qualifying ATL-to-PHL month results, September 2025 had the highest on-time rate: 83.7% of 436 flights. July 2025 was lowest at 55.5% across 528 flights.

MonthFlightsOn time30+ minCancelled
July 202552855.5%30.7%3.6%
August 202550673.1%17.2%2.2%
September 202543683.7%10.1%0.5%
October 202547477.4%14.3%0.2%
November 202546574.4%14.0%4.1%
December 202546064.8%23.3%3.7%
January 202642572.7%13.9%6.6%
February 202640671.2%11.8%5.9%
March 202645867.9%19.4%4.1%
April 202649178.0%11.2%1.2%
May 202652078.1%15.4%1.0%
June 202654476.1%14.9%2.0%

What drove ATL to PHL delay minutes?

Late aircraft was the largest recorded ATL-to-PHL delay category, accounting for 43.8% of 100,694 BTS-attributed delay minutes during July 2025–June 2026.

Airline35.1%
Late aircraft43.8%
National airspace18.5%
Weather2.6%
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.