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

Grand Rapids, MI (GRR) to Chicago, IL (ORD) flight delay odds

Historically, 66.3% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 4,038 flights.

HISTORICAL ROUTE SIGNALVariable
66.3%arrived on time
19.9%30+ min late
2.8%cancelled
4,038scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.3%all scheduled flights
120+ minutes late5.8%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+21.8 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 morning1,23276.6%12.3%2.4%
Late morning74172.2%17.7%2.2%
Afternoon1,33163.3%23.1%2.4%
Evening71448.5%29.6%4.5%

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
Monday59763.7%22.3%4.2%
Tuesday57069.3%18.4%1.1%
Wednesday55967.4%19.5%2.3%
Thursday59169.7%17.3%3.4%
Friday59263.7%21.8%1.9%
Saturday54369.6%18.2%3.3%
Sunday58661.4%21.8%3.2%

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
United Airlines1,07564.3%20.3%1.3%
Envoy Air93166.9%19.1%3.7%
SkyWest Airlines83762.4%24.7%3.2%
Republic Airways66168.8%16.6%2.9%
American Airlines53272.9%16.9%3.4%
PSA Airlines20.0%100.0%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202532963.8%24.0%2.4%
August 202531567.3%18.4%1.6%
September 202530871.8%15.6%0.6%
October 202535971.0%14.5%0.3%
November 202535968.5%16.2%7.0%
December 202531853.1%31.1%3.1%
January 202628457.0%30.3%2.1%
February 202628767.9%19.2%0.3%
March 202633661.6%22.6%4.2%
April 202644261.8%23.5%6.1%
May 202642176.5%12.8%1.2%
June 202628073.9%12.9%2.9%

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.

Airline27.7%
Late aircraft30.9%
National airspace30.4%
Weather10.8%
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.