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Route Reliability

Washington → Chicago

DCA–MDW · 601 miles · Ronald Reagan Washington National Airport to Chicago Midway International Airport

72
Usually Fine
WanderNerd Reliability Score
78%
Arrive within 15 minutes
9 min
Average arrival delay
2.6%
Cancelled
2,104
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 78% of the time across 2,104 flights. No comparison to make.

What the data says

Morning-you made the right choice.

DCA–MDW flights departing between 6–9 AM arrived on time 93% of the time, versus 62% between 9 PM–12 AM.

Friday is doing you no favors.

DCA–MDW flights arrived on time 87% of the time on Saturdays and just 71% on Fridays. That gap is worth planning around.

Recent months have been rougher.

DCA–MDW flights arrived on time 72% of the time over the last three months in the data, compared with 83% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon76%(292 flights)
  • Tue82%(302 flights)
  • Wed78%(306 flights)
  • Thu75%(298 flights)
  • Fri71%(295 flights)
  • Sat87%(245 flights)
  • Sun76%(298 flights)
On-time by departure window
  • 6–9 AM93%(385 flights)
  • 9 AM–12 PM85%(633 flights)
  • 12–3 PM82%(144 flights)
  • 3–6 PM67%(270 flights)
  • 6–9 PM65%(408 flights)
  • 9 PM–12 AM62%(196 flights)
On-time trend by month
72%
May

Jun 70% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202570%173
July 202566%166
August 202581%177
September 202588%176
October 202581%181
November 202577%155
December 202579%172
January 202687%166
February 202684%154
March 202664%170
April 202681%170
May 202672%176

Same trip, other airports

Keep nerding

Based on 2,104 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.