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Airport Reliability

PWM · Portland

Portland International Jetport

82%
Departures within 15 minutes
14 min
Average departure delay
78%
Arrivals within 15 minutes
2.7%
Departures cancelled

Based on 13,417 departures and 13,417 arrivals. Data through May 2026.

What the data says

Morning flights do better here.

Departures from PWM departing between 6–9 AM arrived on time 89% of the time, versus 70% between 3–6 PM.

Wednesday comes out ahead.

A small edge: 82% on time on Wednesdays against 77% on Mondays.

Ticking up lately.

Departures from PWM arrived on time 83% of the time over the last three months in the data, compared with 76% in the three months before that.

When PWM gets messy

On-time by departure window
  • 3–6 AM89%(920 flights)
  • 6–9 AM89%(3187 flights)
  • 9 AM–12 PM87%(1757 flights)
  • 12–3 PM75%(3121 flights)
  • 3–6 PM70%(2921 flights)
  • 6–9 PM70%(1099 flights)
On-time by weekday
  • Mon77%(1867 flights)
  • Tue81%(1809 flights)
  • Wed82%(1838 flights)
  • Thu80%(1867 flights)
  • Fri81%(1898 flights)
  • Sat80%(1831 flights)
  • Sun77%(1895 flights)
On-time trend by month
87%
May

Jun 73% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%1295
July 202570%1348
August 202582%1450
September 202586%1335
October 202582%1395
November 202581%940
December 202570%795
January 202674%692
February 202685%650
March 202677%829
April 202685%1046
May 202687%1230

Airlines departing PWM

Busiest routes from PWM

Based on 13,417 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.