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Route Reliability

Grand Rapids → Chicago

GRR–MDW · 137 miles · Gerald R. Ford International Airport to Chicago Midway International Airport

83
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
6 min
Average arrival delay
0.4%
Cancelled
928
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 79% of the time across 928 flights. No comparison to make.

What the data says

The 6–9 AM departure wins.

GRR–MDW flights departing between 6–9 AM arrived on time 85% of the time, versus 63% between 9 AM–12 PM.

Thursday comes out ahead.

A small edge: 82% on time on Thursdays against 77% on Sundays.

Ticking up lately.

GRR–MDW flights arrived on time 83% of the time over the last three months in the data, compared with 77% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon77%(133 flights)
  • Tue80%(137 flights)
  • Wed78%(137 flights)
  • Thu82%(138 flights)
  • Fri78%(136 flights)
  • Sat79%(99 flights)
  • Sun77%(139 flights)
On-time by departure window
  • 6–9 AM85%(343 flights)
  • 9 AM–12 PM63%(16 flights)
  • 12–3 PM84%(195 flights)
  • 3–6 PM78%(207 flights)
  • 6–9 PM63%(158 flights)
On-time trend by month
85%
May

Jun 76% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%83
July 202574%88
August 202575%87
September 202570%86
October 202588%88
November 202583%57
December 202570%59
January 202681%62
February 202682%54
March 202681%82
April 202684%86
May 202685%87

Same trip, other airports

Keep nerding

Based on 928 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.