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

Pittsburgh, PA (PIT) to Chicago, IL (ORD) flight delay odds

76.9% of 3,950 official scheduled PIT-to-ORD flights arrived on time; 14.6% arrived at least 30 minutes late and 2.0% 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 SIGNALGenerally reliable
76.9%arrived on time
14.6%30+ min late
2.0%cancelled
3,950scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.1%all scheduled flights
120+ minutes late4.5%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+10.7 mincompleted flights

Which departure time was most reliable for PIT to ORD?

Among qualifying PIT-to-ORD departure window results, Early morning had the highest on-time rate: 86.9% of 1,372 flights. Evening was lowest at 56.4% across 856 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,37286.9%7.4%1.4%
Late morning74885.4%9.9%1.2%
Afternoon96974.5%16.4%2.5%
Evening85656.4%28.0%2.9%

Which weekday was most reliable for PIT to ORD?

Among qualifying PIT-to-ORD weekday results, Saturday had the highest on-time rate: 81.0% of 484 flights. Monday was lowest at 71.9% across 588 flights.

DayFlightsOn time30+ minCancelled
Monday58871.9%18.2%2.7%
Tuesday57778.7%13.0%1.7%
Wednesday56276.9%13.9%1.6%
Thursday58678.5%11.8%1.7%
Friday56879.4%13.7%0.9%
Saturday48481.0%11.4%2.1%
Sunday58572.5%19.7%3.2%

Which airline was most reliable for PIT to ORD?

Among qualifying PIT-to-ORD airline results, Republic Airways had the highest on-time rate: 82.8% of 1,629 flights. SkyWest Airlines was lowest at 63.7% across 237 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways1,62982.8%11.0%1.7%
United Airlines1,29076.4%14.7%1.9%
American Airlines60467.5%21.9%3.0%
SkyWest Airlines23763.7%21.5%2.1%
Envoy Air19075.8%13.2%2.6%

Which month was most reliable for PIT to ORD?

Among qualifying PIT-to-ORD month results, February 2026 had the highest on-time rate: 84.8% of 257 flights. December 2025 was lowest at 68.6% across 303 flights.

MonthFlightsOn time30+ minCancelled
July 202533771.5%19.9%1.8%
August 202534382.2%9.6%2.6%
September 202534582.0%10.1%0.3%
October 202537281.7%10.5%0.3%
November 202533274.7%15.7%4.5%
December 202530368.6%22.4%0.3%
January 202627169.0%17.7%4.1%
February 202625784.8%7.8%0.4%
March 202628169.0%22.8%3.2%
April 202634774.6%16.1%2.9%
May 202639682.8%10.6%1.0%
June 202636677.6%14.5%3.0%

What drove PIT to ORD delay minutes?

National airspace was the largest recorded PIT-to-ORD delay category, accounting for 41.3% of 77,710 BTS-attributed delay minutes during July 2025–June 2026.

Airline22.2%
Late aircraft30.9%
National airspace41.3%
Weather5.4%
Security0.2%
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.