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

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

74.4% of 931 official scheduled MDW-to-GRR flights arrived on time; 15.0% arrived at least 30 minutes late and 0.9% 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
74.4%arrived on time
15.0%30+ min late
0.9%cancelled
931scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.7%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+9.4 mincompleted flights

Which departure time was most reliable for MDW to GRR?

Among qualifying MDW-to-GRR departure window results, Late morning had the highest on-time rate: 87.8% of 311 flights. Night was lowest at 53.9% across 219 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning31187.8%6.1%0.6%
Afternoon25976.1%11.6%0.0%
Evening14173.8%15.6%0.7%
Night21953.9%31.5%2.3%

Which weekday was most reliable for MDW to GRR?

Among qualifying MDW-to-GRR weekday results, Wednesday had the highest on-time rate: 84.8% of 138 flights. Thursday was lowest at 69.1% across 139 flights.

DayFlightsOn time30+ minCancelled
Monday13870.3%19.6%1.4%
Tuesday14179.4%12.8%0.7%
Wednesday13884.8%9.4%0.0%
Thursday13969.1%16.5%1.4%
Friday13871.7%16.7%0.7%
Saturday10076.0%17.0%2.0%
Sunday13770.1%13.9%0.0%

Which airline was most reliable for MDW to GRR?

Only Southwest Airlines met the MDW-to-GRR airline threshold: 74.4% of 931 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
Southwest Airlines93174.4%15.0%0.9%

Which month was most reliable for MDW to GRR?

Among qualifying MDW-to-GRR month results, November 2025 had the highest on-time rate: 84.7% of 59 flights. June 2026 was lowest at 64.0% across 86 flights.

MonthFlightsOn time30+ minCancelled
July 20258965.2%25.8%1.1%
August 20258771.3%16.1%1.1%
September 20258681.4%10.5%0.0%
October 20258884.1%6.8%0.0%
November 20255984.7%3.4%3.4%
December 20256065.0%21.7%0.0%
January 20266277.4%11.3%0.0%
February 20265678.6%16.1%0.0%
March 20268578.8%15.3%1.2%
April 20268673.3%14.0%2.3%
May 20268772.4%18.4%0.0%
June 20268664.0%18.6%1.2%

What drove MDW to GRR delay minutes?

Late aircraft was the largest recorded MDW-to-GRR delay category, accounting for 49.6% of 12,933 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.6%
Late aircraft49.6%
National airspace12.0%
Weather3.1%
Security0.7%
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.