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

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

70.4% of 4,911 official scheduled PHL-to-ORD flights arrived on time; 18.2% arrived at least 30 minutes late and 3.1% 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
70.4%arrived on time
18.2%30+ min late
3.1%cancelled
4,911scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.4%all scheduled flights
120+ minutes late5.8%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+17.6 mincompleted flights

Which departure time was most reliable for PHL to ORD?

Among qualifying PHL-to-ORD departure window results, Early morning had the highest on-time rate: 80.6% of 1,172 flights. Evening was lowest at 54.2% across 1,156 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,17280.6%8.8%3.5%
Late morning95380.0%12.8%2.0%
Afternoon1,40070.6%20.1%2.4%
Evening1,15654.2%28.3%3.8%
Night23059.1%25.7%6.5%

Which weekday was most reliable for PHL to ORD?

Among qualifying PHL-to-ORD weekday results, Tuesday had the highest on-time rate: 77.1% of 712 flights. Sunday was lowest at 62.5% across 731 flights.

DayFlightsOn time30+ minCancelled
Monday73967.7%19.8%5.8%
Tuesday71277.1%15.2%1.8%
Wednesday68775.8%14.7%2.3%
Thursday70968.7%19.2%3.0%
Friday72570.2%17.7%1.5%
Saturday60871.4%15.6%2.5%
Sunday73162.5%24.4%4.7%

Which airline was most reliable for PHL to ORD?

Among qualifying PHL-to-ORD airline results, United Airlines had the highest on-time rate: 72.4% of 1,773 flights. Frontier Airlines was lowest at 56.1% across 189 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines2,92369.9%18.6%3.9%
United Airlines1,77372.4%16.4%1.7%
Frontier Airlines18956.1%30.2%4.2%
Republic Airways2692.3%3.8%0.0%

Which month was most reliable for PHL to ORD?

Among qualifying PHL-to-ORD month results, February 2026 had the highest on-time rate: 79.1% of 340 flights. July 2025 was lowest at 56.3% across 403 flights.

MonthFlightsOn time30+ minCancelled
July 202540356.3%28.8%6.2%
August 202543964.5%23.7%3.2%
September 202541276.5%16.3%0.2%
October 202544174.4%16.1%0.5%
November 202540868.6%18.4%4.9%
December 202534363.8%23.9%1.7%
January 202632068.1%17.2%5.6%
February 202634079.1%10.6%3.8%
March 202638667.9%19.2%4.9%
April 202643573.6%13.1%3.0%
May 202649278.7%13.4%1.2%
June 202649270.9%18.1%3.3%

What drove PHL to ORD delay minutes?

Late aircraft was the largest recorded PHL-to-ORD delay category, accounting for 37.2% of 126,609 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.1%
Late aircraft37.2%
National airspace37.0%
Weather3.6%
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.