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Route Reliability

Portland → Chicago

PDX–MDW · 1,751 miles · Portland International Airport to Chicago Midway International Airport

93
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
3 min early
Average arrival delay
0.7%
Cancelled
686
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 90% of the time across 686 flights. No comparison to make.

What the data says

The late departure is the smart one here.

PDX–MDW flights departing between 9 PM–12 AM arrived on time 95% of the time, versus 72% between 12–3 PM.

Sunday scaries are real for this one.

PDX–MDW flights arrived on time 94% of the time on Saturdays. On Sundays: 84%.

Ticking up lately.

PDX–MDW flights arrived on time 95% of the time over the last three months in the data, compared with 90% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon90%(101 flights)
  • Tue90%(102 flights)
  • Wed92%(102 flights)
  • Thu87%(103 flights)
  • Fri89%(99 flights)
  • Sat94%(88 flights)
  • Sun84%(82 flights)
On-time by departure window
  • 3–6 AM94%(125 flights)
  • 6–9 AM94%(295 flights)
  • 9 AM–12 PM90%(40 flights)
  • 12–3 PM72%(131 flights)
  • 9 PM–12 AM95%(86 flights)
On-time trend by month
97%
May

Jun 82% → May 97% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202582%78
July 202581%85
August 202592%84
September 202592%82
October 202585%54
November 202597%30
December 202584%31
January 202690%31
February 202696%28
March 202693%55
April 202697%59
May 202697%60

Same trip, other airports

Keep nerding

Based on 686 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.