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Route Reliability

Chicago → Portland

ORD–PWM · 900 miles · Chicago O'Hare International Airport to Portland International Jetport

74
Usually Fine
WanderNerd Reliability Score
75%
Arrive within 15 minutes
10 min
Average arrival delay
2.1%
Cancelled
1,462
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.American Airlines76%620 flights
  2. 2.United Airlines74%842 flights

What the data says

Morning flights do better here.

ORD–PWM flights departing between 6–9 AM arrived on time 90% of the time, versus 60% between 3–6 PM.

Monday is the weak spot.

ORD–PWM flights arrived on time 79% of the time on Fridays. On Mondays: 71%.

Not much between American Airlines and United Airlines.

On this route they all land within 74% to 76% on time. Pick on schedule and price.

Ticking up lately.

ORD–PWM flights arrived on time 74% of the time over the last three months in the data, compared with 70% in the three months before that.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon71%(200 flights)
  • Tue77%(195 flights)
  • Wed75%(193 flights)
  • Thu76%(210 flights)
  • Fri79%(210 flights)
  • Sat72%(211 flights)
  • Sun73%(210 flights)
On-time by departure window
  • 6–9 AM90%(183 flights)
  • 9 AM–12 PM77%(430 flights)
  • 12–3 PM78%(259 flights)
  • 3–6 PM60%(115 flights)
  • 6–9 PM67%(442 flights)
On-time trend by month
81%
May

Jun 77% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202577%125
July 202568%145
August 202575%172
September 202580%165
October 202576%166
November 202573%85
December 202561%61
January 202661%33
February 202688%58
March 202665%111
April 202676%143
May 202681%165

Same trip, other airports

Keep nerding

Based on 1,462 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.