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

Chicago, IL (ORD) to Green Bay, WI (GRB) flight delay odds

65.7% of 2,775 official scheduled ORD-to-GRB flights arrived on time; 20.2% arrived at least 30 minutes late and 4.3% 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
65.7%arrived on time
20.2%30+ min late
4.3%cancelled
2,775scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.1%all scheduled flights
120+ minutes late5.5%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+18.5 mincompleted flights

Which departure time was most reliable for ORD to GRB?

Among qualifying ORD-to-GRB departure window results, Early morning had the highest on-time rate: 77.5% of 565 flights. Evening was lowest at 57.0% across 695 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning56577.5%11.0%3.0%
Late morning30471.7%14.8%3.6%
Afternoon88564.2%22.3%3.6%
Evening69557.0%27.9%5.2%
Night32662.6%19.0%7.1%

Which weekday was most reliable for ORD to GRB?

Among qualifying ORD-to-GRB weekday results, Tuesday had the highest on-time rate: 70.1% of 381 flights. Sunday was lowest at 60.8% across 424 flights.

DayFlightsOn time30+ minCancelled
Monday42164.1%20.9%6.9%
Tuesday38170.1%17.6%2.6%
Wednesday36464.8%20.1%3.3%
Thursday40366.5%19.6%3.5%
Friday40165.3%21.4%2.7%
Saturday38169.0%17.6%5.5%
Sunday42460.8%23.6%5.2%

Which airline was most reliable for ORD to GRB?

Among qualifying ORD-to-GRB airline results, Republic Airways had the highest on-time rate: 75.3% of 166 flights. SkyWest Airlines was lowest at 58.2% across 1,234 flights.

AirlineFlightsOn time30+ minCancelled
Envoy Air1,37571.3%16.6%3.7%
SkyWest Airlines1,23458.2%24.8%4.9%
Republic Airways16675.3%15.7%4.8%

Which month was most reliable for ORD to GRB?

Among qualifying ORD-to-GRB month results, October 2025 had the highest on-time rate: 85.0% of 214 flights. December 2025 was lowest at 48.6% across 247 flights.

MonthFlightsOn time30+ minCancelled
July 202526358.2%24.3%1.5%
August 202524069.6%17.5%4.2%
September 202519481.4%7.7%1.0%
October 202521485.0%7.9%0.5%
November 202527269.9%14.0%8.8%
December 202524748.6%36.8%4.0%
January 202616354.0%34.4%1.2%
February 202616368.1%16.6%0.0%
March 202628055.7%20.4%13.9%
April 202631262.5%23.7%5.8%
May 202621767.7%21.7%0.9%
June 202621074.8%15.2%3.3%

What drove ORD to GRB delay minutes?

Late aircraft was the largest recorded ORD-to-GRB delay category, accounting for 38.6% of 64,663 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.5%
Late aircraft38.6%
National airspace20.1%
Weather13.8%
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.