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

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

Historically, 77.1% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,137 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.