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Route Reliability

Sacramento → Chicago

SMF–MDW · 1,790 miles · Sacramento International Airport to Chicago Midway International Airport

92
Nerd Approved
WanderNerd Reliability Score
87%
Arrive within 15 minutes
0 min
Average arrival delay
0.2%
Cancelled
666
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 87% of the time across 666 flights. No comparison to make.

What the data says

Morning-you made the right choice.

SMF–MDW flights departing between 3–6 AM arrived on time 93% of the time, versus 69% between 3–6 PM.

Friday is doing you no favors.

SMF–MDW flights arrived on time 95% of the time on Wednesdays. On Fridays: 82%.

It basically never cancels.

Out of 666 scheduled flights, only 0.2% were cancelled.

Ticking up lately.

SMF–MDW flights arrived on time 89% of the time over the last three months in the data, compared with 86% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon82%(102 flights)
  • Tue91%(102 flights)
  • Wed95%(104 flights)
  • Thu84%(102 flights)
  • Fri82%(102 flights)
  • Sat88%(82 flights)
  • Sun85%(67 flights)
On-time by departure window
  • 3–6 AM93%(132 flights)
  • 6–9 AM91%(219 flights)
  • 9 AM–12 PM90%(109 flights)
  • 12–3 PM70%(86 flights)
  • 3–6 PM69%(26 flights)
  • 9 PM–12 AM87%(89 flights)
On-time trend by month
86%
May

Jun 89% → May 86% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202589%73
July 202587%78
August 202588%76
September 202583%78
October 202584%55
November 202587%31
December 202584%31
January 202681%31
February 202693%28
March 202690%58
April 202692%60
May 202686%62

Same trip, other airports

Keep nerding

Based on 666 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.