FlightRecord

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

Data through July 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 24 destinations.

Departures on-time
82%
left <15 min late
Avg dep delay
18 min
Arrivals on-time
78%
Cancelled
2.4%
Destinations
24
nonstop
Airlines
11

Plan your departure from PWM

The choices most likely to improve your odds, based on this airport’s historical record.

Best departure time
Around 9 a.m.
93% on-time
Best day to fly
Wednesday
82% on-time
Most reliable airline here
Republic Airways
86% on-time from PWM
Cancellation risk
2.4%
above the US average
Check routes from PWM ↓Compare nearby airports ↓

Monthly on-time trend

Monthly departure on-time percentage at PWM50%75%100%August 2024: 77% on-time (1,465 flights)77Aug 2024September 2024: 88% on-time (1,395 flights)88October 2024: 84% on-time (1,307 flights)84November 2024: 86% on-time (827 flights)86Nov 2024December 2024: 83% on-time (785 flights)83January 2025: 85% on-time (562 flights)85February 2025: 81% on-time (477 flights)81Feb 2025March 2025: 86% on-time (549 flights)86April 2025: 90% on-time (782 flights)90May 2025: 85% on-time (987 flights)85May 2025June 2025: 74% on-time (1,139 flights)74July 2025: 72% on-time (1,275 flights)72August 2025: 82% on-time (1,309 flights)82Aug 2025September 2025: 88% on-time (1,202 flights)88October 2025: 84% on-time (1,266 flights)84November 2025: 82% on-time (656 flights)82Nov 2025December 2025: 76% on-time (546 flights)76January 2026: 81% on-time (556 flights)81February 2026: 83% on-time (521 flights)83Feb 2026March 2026: 80% on-time (641 flights)80April 2026: 84% on-time (720 flights)84May 2026: 87% on-time (1,056 flights)87May 2026June 2026: 81% on-time (1,201 flights)81July 2026: 73% on-time (1,251 flights)73

Best time of day to depart from PWM

On-time percentage by scheduled departure hour at PWM5 a.m.: 92% on-time (2,450 flights)56 a.m.: 91% on-time (3,372 flights)67 a.m.: 92% on-time (1,461 flights)78 a.m.: 91% on-time (443 flights)89 a.m.: 93% on-time (541 flights)910 a.m.: 85% on-time (781 flights)1011 a.m.: 86% on-time (1,524 flights)1112 p.m.: 80% on-time (2,493 flights)121 p.m.: 75% on-time (1,404 flights)132 p.m.: 76% on-time (1,654 flights)143 p.m.: 75% on-time (1,815 flights)154 p.m.: 77% on-time (2,211 flights)165 p.m.: 69% on-time (1,967 flights)176 p.m.: 65% on-time (719 flights)187 p.m.: 78% on-time (778 flights)198 p.m.: 67% on-time (182 flights)20scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday77%21 min
Tuesday82%17 min
Wednesdaybest82%14 min
Thursday79%18 min
Friday78%21 min
Saturday79%21 min
Sunday78%19 min

Next: compare the busiest routes from PWM ↓

Busiest routes from PWM

RouteFlights/12moOn-timeAvg delay
PWM → ORD (Chicago)1,49479%17 min
PWM → BWI (Baltimore)1,34281%12 min
PWM → LGA (New York)1,18381%17 min
PWM → DCA (Washington)1,15975%28 min
PWM → EWR (Newark)1,08282%17 min
PWM → CLT (Charlotte)70879%23 min
PWM → IAD (Washington)68686%11 min
PWM → PHL (Philadelphia)67677%26 min
PWM → ATL (Atlanta)64279%18 min
PWM → DTW (Detroit)61379%19 min
PWM → JFK (New York)39878%22 min
PWM → DEN (Denver)21471%22 min
PWM → BNA (Nashville)15972%17 min
PWM → MDW (Chicago)15178%18 min
PWM → DFW (Dallas/Fort Worth)14976%27 min
PWM → MSP (Minneapolis)14387%8 min

Compare airlines departing PWM ↓

Where flights into PWM come from

RouteFlights/12moOn-timeAvg delay
ORD (Chicago) → PWM1,49478%16 min
BWI (Baltimore) → PWM1,34278%12 min
LGA (New York) → PWM1,18381%12 min
DCA (Washington) → PWM1,15971%21 min
EWR (Newark) → PWM98081%15 min
IAD (Washington) → PWM78786%12 min
CLT (Charlotte) → PWM70874%21 min
PHL (Philadelphia) → PWM67575%21 min

Most reliable routes

  1. PWM → MSP87%
  2. PWM → IAD86%
  3. PWM → EWR82%
  4. PWM → LGA81%
  5. PWM → BWI81%

Most delay-prone routes

  1. PWM → DEN71%
  2. PWM → BNA72%
  3. PWM → DCA75%
  4. PWM → DFW76%
  5. PWM → PHL77%

What causes delays at PWM

Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing PWM.

  • Late-arriving aircraft32%
  • Airline operations34%
  • National airspace system26%
  • Weather8%

Alternative airports near Portland

Other airports within 120 miles, compared on departure reliability.

AirportDistanceOn-time departuresAvg delay
MHT — Manchester-Boston Regional Airport75 mi82%16 min
BOS — Boston Logan International Airport95 mi78%17 min
BGR — Bangor International Airport109 mi80%22 min

Compare the airport-level record first, then check the exact route you plan to book.

Airline performance at PWM

AirlineOn-time departuresAvg delayFlights
Republic Airways86%13 min7,454
United Airlines86%15 min1,874
Envoy Air85%11 min576
American Airlines79%25 min4,004
Southwest Airlines79%14 min3,456
SkyWest Airlines79%20 min992
Delta Air Lines78%19 min2,184
PSA Airlines78%28 min1,698
Endeavor Air77%35 min286
JetBlue Airways77%22 min1,005
Frontier Airlines76%25 min309

Frequently asked questions

How often are flights delayed at PWM?
18% of departures from Portland International Jetport left 15+ minutes late between 2024-07 and 2026-07, with an average departure delay of 18 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 93% of the time at PWM, versus 65% around 6 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?
2.4% of scheduled departures from PWM were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Related guides

Based on 23,838 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.