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

Chicago, IL (ORD) to Philadelphia, PA (PHL) flight delay odds

69.1% of 4,918 official scheduled ORD-to-PHL flights arrived on time; 20.7% 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
69.1%arrived on time
20.7%30+ min late
2.8%cancelled
4,918scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.8%all scheduled flights
120+ minutes late5.9%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+20.3 mincompleted flights

Which departure time was most reliable for ORD to PHL?

Among qualifying ORD-to-PHL departure window results, Early morning had the highest on-time rate: 80.9% of 1,275 flights. Evening was lowest at 58.1% across 1,148 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,27580.9%11.1%2.8%
Late morning94974.0%17.2%1.6%
Afternoon1,20764.9%24.3%2.6%
Evening1,14858.1%29.0%4.2%
Night33963.1%25.7%2.9%

Which weekday was most reliable for ORD to PHL?

Among qualifying ORD-to-PHL weekday results, Tuesday had the highest on-time rate: 74.1% of 711 flights. Monday was lowest at 63.4% across 738 flights.

DayFlightsOn time30+ minCancelled
Monday73863.4%24.8%3.4%
Tuesday71174.1%17.4%2.7%
Wednesday69472.6%19.3%2.0%
Thursday71170.0%20.5%2.4%
Friday72769.5%21.2%1.0%
Saturday61171.0%17.8%3.3%
Sunday72663.5%23.0%5.2%

Which airline was most reliable for ORD to PHL?

Among qualifying ORD-to-PHL airline results, United Airlines had the highest on-time rate: 71.2% of 1,776 flights. Frontier Airlines was lowest at 58.2% across 189 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines2,92668.4%20.6%3.8%
United Airlines1,77671.2%19.9%1.3%
Frontier Airlines18958.2%30.2%3.7%
Republic Airways2781.5%11.1%0.0%

Which month was most reliable for ORD to PHL?

Among qualifying ORD-to-PHL month results, May 2026 had the highest on-time rate: 77.4% of 492 flights. July 2025 was lowest at 52.2% across 404 flights.

MonthFlightsOn time30+ minCancelled
July 202540452.2%36.4%5.2%
August 202543869.4%21.0%3.0%
September 202541275.5%17.0%0.0%
October 202544376.7%16.7%0.0%
November 202541069.3%19.0%4.6%
December 202534463.7%25.3%1.5%
January 202632064.4%20.6%5.6%
February 202634177.4%12.0%3.8%
March 202638760.5%24.8%4.4%
April 202643569.9%17.9%3.0%
May 202649277.4%15.4%1.0%
June 202649268.9%22.8%3.3%

What drove ORD to PHL delay minutes?

Late aircraft was the largest recorded ORD-to-PHL delay category, accounting for 48.7% of 129,197 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.4%
Late aircraft48.7%
National airspace17.5%
Weather6.3%
Security0.1%
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.