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Route Reliability

Philadelphia → Chicago

PHL–MDW · 668 miles · Philadelphia International Airport to Chicago Midway International Airport

71
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
15 min
Average arrival delay
1.5%
Cancelled
1,531
Flights in the data

Data through May 2026.

Airlines on this route

  • Southwest Airlines73% on time · 1,445 flights
  • Frontier Airlines77% on time · 86 flights

Too little history on this route to call a winner. We rank airlines only after 100 flights each.

What the data says

Morning-you made the right choice.

PHL–MDW flights departing between 6–9 AM arrived on time 90% of the time, versus 48% between 6–9 PM.

Sunday scaries are real for this one.

PHL–MDW flights arrived on time 81% of the time on Tuesdays and just 65% on Sundays. That gap is worth planning around.

Flights on this route

The breakdown

On-time by weekday
  • Mon69%(233 flights)
  • Tue81%(212 flights)
  • Wed81%(212 flights)
  • Thu71%(222 flights)
  • Fri74%(236 flights)
  • Sat76%(157 flights)
  • Sun65%(229 flights)
On-time by departure window
  • 3–6 AM88%(185 flights)
  • 6–9 AM90%(200 flights)
  • 9 AM–12 PM85%(216 flights)
  • 12–3 PM81%(313 flights)
  • 3–6 PM62%(272 flights)
  • 6–9 PM48%(295 flights)
  • 9 PM–12 AM65%(20 flights)
On-time trend by month
76%
May

Jun 63% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%145
July 202556%150
August 202577%155
September 202585%159
October 202577%155
November 202579%126
December 202562%122
January 202676%93
February 202685%79
March 202664%89
April 202685%109
May 202676%119

Same trip, other airports

Keep nerding

Based on 1,531 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.