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

Chicago, IL (ORD) to Birmingham, AL (BHM) flight delay odds

77.1% of 1,137 official scheduled ORD-to-BHM flights arrived on time; 13.7% arrived at least 30 minutes late and 1.8% 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 SIGNALGenerally reliable
77.1%arrived on time
13.7%30+ min late
1.8%cancelled
1,137scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.3%all scheduled flights
120+ minutes late2.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+3.6 mincompleted flights

Which departure time was most reliable for ORD to BHM?

Among qualifying ORD-to-BHM departure window results, Late morning had the highest on-time rate: 86.3% of 153 flights. Night was lowest at 71.0% across 100 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning24781.4%12.6%2.0%
Late morning15386.3%10.5%0.0%
Afternoon38175.9%13.4%0.5%
Evening25671.9%17.6%3.5%
Night10071.0%13.0%4.0%

Which weekday was most reliable for ORD to BHM?

Among qualifying ORD-to-BHM weekday results, Tuesday had the highest on-time rate: 83.6% of 146 flights. Monday was lowest at 74.0% across 169 flights.

DayFlightsOn time30+ minCancelled
Monday16974.0%11.2%4.7%
Tuesday14683.6%10.3%0.0%
Wednesday16577.6%15.8%0.6%
Thursday16679.5%13.3%1.8%
Friday16874.4%12.5%1.8%
Saturday15474.0%16.2%2.6%
Sunday16977.5%16.6%0.6%

Which airline was most reliable for ORD to BHM?

Among qualifying ORD-to-BHM airline results, Republic Airways had the highest on-time rate: 81.2% of 255 flights. SkyWest Airlines was lowest at 60.7% across 107 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air77378.0%12.9%1.7%
Republic Airways25581.2%12.5%2.0%
SkyWest Airlines10760.7%22.4%1.9%
PSA Airlines2100.0%0.0%0.0%

Which month was most reliable for ORD to BHM?

Among qualifying ORD-to-BHM month results, September 2025 had the highest on-time rate: 90.9% of 121 flights. December 2025 was lowest at 64.4% across 73 flights.

MonthFlightsOn time30+ minCancelled
July 20258375.9%12.0%2.4%
August 202510888.9%6.5%1.9%
September 202512190.9%6.6%0.0%
October 202511475.4%11.4%0.0%
November 20258476.2%16.7%4.8%
December 20257364.4%27.4%0.0%
January 20267569.3%25.3%1.3%
February 202612574.4%13.6%0.0%
March 202610173.3%17.8%4.0%
April 20269171.4%16.5%2.2%
May 202610283.3%6.9%2.9%
June 20266070.0%13.3%3.3%

What drove ORD to BHM delay minutes?

Late aircraft was the largest recorded ORD-to-BHM delay category, accounting for 44.0% of 15,399 BTS-attributed delay minutes during July 2025–June 2026.

Airline14.3%
Late aircraft44.0%
National airspace20.2%
Weather21.5%
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.