FlightRecord

Portland International Jetport (PWM): Delays & On-Time Performance

Data through May 2026

Portland International Jetport (PWM) is a tale of two seasons: departures ran 90% on-time in April 2025 but sank to 72% in July 2025. Across the year it averages 82% against a national 78%, over roughly 30 departures a day to 22 destinations.

Departures on-time
82%
left <15 min late
Avg dep delay
17 min
Arrivals on-time
78%
Cancelled
2.3%
Destinations
22
nonstop
Airlines
11

Monthly on-time trend

Monthly departure on-time percentage at PWM50%75%100%June 2024: 78% on-time (1,285 flights)78Jun 2024July 2024: 76% on-time (1,363 flights)76August 2024: 77% on-time (1,465 flights)77September 2024: 88% on-time (1,395 flights)88Sep 2024October 2024: 84% on-time (1,307 flights)84November 2024: 86% on-time (827 flights)86December 2024: 83% on-time (785 flights)83Dec 2024January 2025: 85% on-time (562 flights)85February 2025: 81% on-time (477 flights)81March 2025: 86% on-time (549 flights)86Mar 2025April 2025: 90% on-time (782 flights)90May 2025: 85% on-time (987 flights)85June 2025: 74% on-time (1,139 flights)74Jun 2025July 2025: 72% on-time (1,275 flights)72August 2025: 82% on-time (1,309 flights)82September 2025: 88% on-time (1,202 flights)88Sep 2025October 2025: 84% on-time (1,266 flights)84November 2025: 82% on-time (656 flights)82December 2025: 76% on-time (546 flights)76Dec 2025January 2026: 81% on-time (556 flights)81February 2026: 83% on-time (521 flights)83March 2026: 80% on-time (641 flights)80Mar 2026April 2026: 84% on-time (720 flights)84May 2026: 87% on-time (1,056 flights)87

Best time of day to depart from PWM

On-time percentage by scheduled departure hour at PWM5 a.m.: 92% on-time (2,380 flights)56 a.m.: 91% on-time (3,175 flights)67 a.m.: 92% on-time (1,403 flights)78 a.m.: 91% on-time (406 flights)89 a.m.: 94% on-time (506 flights)910 a.m.: 85% on-time (685 flights)1011 a.m.: 86% on-time (1,526 flights)1112 p.m.: 80% on-time (2,458 flights)121 p.m.: 76% on-time (1,336 flights)132 p.m.: 77% on-time (1,544 flights)143 p.m.: 76% on-time (1,699 flights)154 p.m.: 77% on-time (2,273 flights)165 p.m.: 69% on-time (1,742 flights)176 p.m.: 66% on-time (660 flights)187 p.m.: 78% on-time (691 flights)198 p.m.: 64% on-time (133 flights)20scheduled departure hour

Busiest routes from PWM

RouteFlights/12moOn-timeAvg delay
PWM → ORD1,46178%17 min
PWM → BWI1,34381%12 min
PWM → DCA1,14975%27 min
PWM → LGA1,10581%17 min
PWM → EWR1,05882%15 min
PWM → PHL76477%25 min
PWM → CLT70479%23 min
PWM → IAD70187%9 min

Most reliable routes

  1. PWM → IAD87%
  2. PWM → MSP87%
  3. PWM → EWR82%
  4. PWM → BWI81%
  5. PWM → LGA81%

Most delay-prone routes

  1. PWM → DEN71%
  2. PWM → BNA74%
  3. PWM → DCA75%
  4. PWM → MCO75%
  5. PWM → MDW75%

Airline performance at PWM

AirlineOn-time departuresAvg delayFlights
Republic Airways87%12 min7,117
United Airlines86%14 min1,731
Envoy Air85%11 min563
Southwest Airlines80%14 min3,251
Delta Air Lines80%16 min1,916
American Airlines79%24 min3,735
SkyWest Airlines79%21 min986
PSA Airlines78%27 min1,677
JetBlue Airways78%20 min945
Frontier Airlines75%25 min375
Endeavor Air73%35 min375

Frequently asked questions

How often are flights delayed at PWM?
18% of departures from Portland International Jetport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 17 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from PWM?
Flights scheduled around 9 a.m. depart on time 94% of the time at PWM, versus 64% around 8 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at PWM?
In this dataset, July 2025 was the weakest month at PWM, with 72% of departures on time.
How often are flights cancelled at PWM?
2.3% of scheduled departures from PWM were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 22,671 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.