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Route Reliability

Detroit → Portland

DTW–PWM · 668 miles · Detroit Metropolitan Wayne County Airport to Portland International Jetport

86
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
5 min
Average arrival delay
1.1%
Cancelled
660
Flights in the data

Data through May 2026.

Delta Air Lines is the only airline in this data on this route, arriving on time 83% of the time across 660 flights. No comparison to make.

What the data says

3–6 PM has a slight edge.

Departures between 3–6 PM arrived on time 86% of the time, against 82% between 12–3 PM.

Sunday scaries are real for this one.

DTW–PWM flights arrived on time 88% of the time on Wednesdays. On Sundays: 74%.

Trending in the right direction.

DTW–PWM flights arrived on time 88% of the time over the last three months in the data, compared with 66% 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
  • Mon80%(94 flights)
  • Tue82%(95 flights)
  • Wed88%(93 flights)
  • Thu83%(92 flights)
  • Fri87%(91 flights)
  • Sat86%(93 flights)
  • Sun74%(95 flights)
On-time by departure window
  • 9 AM–12 PM83%(361 flights)
  • 12–3 PM82%(270 flights)
  • 3–6 PM86%(22 flights)
On-time trend by month
95%
May

Jun 85% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202585%59
July 202587%61
August 202579%61
September 202585%60
October 202592%61
November 202588%57
December 202565%57
January 202656%34
February 202678%27
March 202676%55
April 202692%60
May 202695%61

Keep nerding

Based on 660 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.