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Route Reliability

Chicago → Portland

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

67
Usually Fine
WanderNerd Reliability Score
65%
Arrive within 15 minutes
16 min
Average arrival delay
0.7%
Cancelled
685
Flights in the data

Data through May 2026.

Southwest Airlines is the only airline in this data on this route, arriving on time 65% of the time across 685 flights. No comparison to make.

What the data says

Morning-you made the right choice.

MDW–PDX flights departing between 6–9 AM arrived on time 75% of the time, versus 53% between 9 PM–12 AM.

Friday is doing you no favors.

MDW–PDX flights arrived on time 74% of the time on Saturdays and just 57% on Fridays. That gap is worth planning around.

Slipping a little lately.

MDW–PDX flights arrived on time 55% of the time over the last three months in the data, compared with 59% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon62%(102 flights)
  • Tue67%(102 flights)
  • Wed70%(101 flights)
  • Thu64%(102 flights)
  • Fri57%(101 flights)
  • Sat74%(90 flights)
  • Sun63%(81 flights)
On-time by departure window
  • 6–9 AM75%(133 flights)
  • 9 AM–12 PM73%(117 flights)
  • 12–3 PM69%(45 flights)
  • 3–6 PM66%(129 flights)
  • 6–9 PM60%(107 flights)
  • 9 PM–12 AM53%(148 flights)
On-time trend by month
65%
May

Jun 62% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202562%78
July 202563%88
August 202569%84
September 202584%81
October 202580%54
November 202576%29
December 202536%31
January 202677%31
February 202664%28
March 202638%56
April 202661%59
May 202665%60

Same trip, other airports

Keep nerding

Based on 685 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.