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

Decatur, IL (DEC) to Chicago, IL (ORD) flight delay odds

63.9% of 626 official scheduled DEC-to-ORD flights arrived on time; 21.2% arrived at least 30 minutes late and 5.4% 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 SIGNALHigher disruption
63.9%arrived on time
21.2%30+ min late
5.4%cancelled
626scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late13.6%all scheduled flights
120+ minutes late6.1%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+24.7 mincompleted flights

Which departure time was most reliable for DEC to ORD?

Among qualifying DEC-to-ORD departure window results, Late morning had the highest on-time rate: 78.9% of 298 flights. Evening was lowest at 50.3% across 328 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning29878.9%12.8%2.0%
Evening32850.3%29.0%8.5%

Which weekday was most reliable for DEC to ORD?

Among qualifying DEC-to-ORD weekday results, Monday had the highest on-time rate: 72.1% of 104 flights. Sunday was lowest at 58.7% across 104 flights.

DayFlightsOn time30+ minCancelled
Monday10472.1%19.2%5.8%
Tuesday5666.1%23.2%3.6%
Wednesday10265.7%19.6%3.9%
Thursday10162.4%20.8%5.9%
Friday10461.5%19.2%3.8%
Saturday5560.0%23.6%7.3%
Sunday10458.7%25.0%7.7%

Which airline was most reliable for DEC to ORD?

Only SkyWest Airlines met the DEC-to-ORD airline threshold: 63.9% of 626 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
SkyWest Airlines62663.9%21.2%5.4%

Which month was most reliable for DEC to ORD?

Among qualifying DEC-to-ORD month results, February 2026 had the highest on-time rate: 79.2% of 48 flights. June 2026 was lowest at 54.9% across 51 flights.

MonthFlightsOn time30+ minCancelled
July 20255367.9%18.9%7.5%
August 20255369.8%18.9%3.8%
September 20255176.5%11.8%0.0%
October 20255461.1%25.9%0.0%
November 20255060.0%24.0%6.0%
December 20255556.4%23.6%7.3%
January 20265356.6%30.2%5.7%
February 20264879.2%18.8%0.0%
March 20265358.5%20.8%15.1%
April 20265265.4%19.2%9.6%
May 20265362.3%20.8%1.9%
June 20265154.9%21.6%7.8%

What drove DEC to ORD delay minutes?

Late aircraft was the largest recorded DEC-to-ORD delay category, accounting for 43.9% of 18,222 BTS-attributed delay minutes during July 2025–June 2026.

Airline32.0%
Late aircraft43.9%
National airspace15.2%
Weather8.9%
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.