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Route Reliability

Charleston → Chicago

CHS–MDW · 745 miles · Charleston International Airport to Chicago Midway International Airport

88
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
1 min
Average arrival delay
0.3%
Cancelled
346
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 85% of the time across 346 flights. No comparison to make.

What the data says

Morning-you made the right choice.

CHS–MDW flights departing between 3–6 AM arrived on time 95% of the time, versus 63% between 3–6 PM.

Sunday scaries are real for this one.

CHS–MDW flights arrived on time 94% of the time on Wednesdays and just 75% on Sundays. That gap is worth planning around.

It basically never cancels.

Out of 346 scheduled flights, only 0.3% were cancelled.

Ticking up lately.

CHS–MDW flights arrived on time 78% of the time over the last three months in the data, compared with 72% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon91%(45 flights)
  • Tue87%(37 flights)
  • Wed94%(35 flights)
  • Thu83%(42 flights)
  • Fri85%(48 flights)
  • Sat88%(56 flights)
  • Sun75%(79 flights)
On-time by departure window
  • 3–6 AM95%(80 flights)
  • 6–9 AM93%(136 flights)
  • 9 AM–12 PM—(1 flights)
  • 3–6 PM63%(32 flights)
  • 6–9 PM71%(93 flights)
On-time trend by month
89%
May

Jun 92% → May 89% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%39
July 202587%39
August 202594%36
September 202594%34
October 202586%35
November 202552%21
December 202571%17
February 202694%17
March 202662%26
April 202685%33
May 202689%36

Same trip, other airports

Keep nerding

Based on 346 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.