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Route Reliability

Salt Lake City → Chicago

SLC–MDW · 1,259 miles · Salt Lake City International Airport to Chicago Midway International Airport

88
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
3 min early
Average arrival delay
0.8%
Cancelled
617
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 86% of the time across 617 flights. No comparison to make.

What the data says

Morning-you made the right choice.

SLC–MDW flights departing between 3–6 AM arrived on time 96% of the time, versus 69% between 3–6 PM.

Skip Saturday if you can.

SLC–MDW flights arrived on time 90% of the time on Sundays. On Saturdays: 80%.

Recent months have been rougher.

SLC–MDW flights arrived on time 75% of the time over the last three months in the data, compared with 93% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon84%(89 flights)
  • Tue83%(88 flights)
  • Wed87%(87 flights)
  • Thu86%(91 flights)
  • Fri87%(93 flights)
  • Sat80%(70 flights)
  • Sun90%(90 flights)
On-time by departure window
  • 3–6 AM96%(141 flights)
  • 6–9 AM94%(207 flights)
  • 9 AM–12 PM80%(10 flights)
  • 12–3 PM74%(205 flights)
  • 3–6 PM69%(45 flights)
On-time trend by month
74%
May

Jun 86% → May 74% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202586%55
July 202589%56
August 202591%56
September 202593%56
October 202584%57
November 202585%34
December 202583%42
January 202695%39
February 2026100%46
March 202674%58
April 202677%56
May 202674%53

Same trip, other airports

Keep nerding

Based on 617 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.