Airports › Portland (PWM) › September 2025
Airport month · September 2025
Portland International Jetport in September 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In September 2025, reporting carriers scheduled 1,202 domestic departures from Portland International Jetport (PWM). 87.8% left less than 15 minutes late and 84.7% reached their destination on time; 0.6% were cancelled.
Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so PWM departures were 4.7 points above the national departure figure.
A year earlier, in September 2024, the airport had 1,395 departures with 88.2% leaving on time: a change of −0.4 points, with flights down 14%.
Flights arriving at PWM that month were on time 84.4% of the time (1,202 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 38%, air carrier 32% and national aviation system 27%.
- On time 84.7%
- Arrived 15+ minutes late 14.3%
- Cancelled 0.6%
- Diverted 0.4%
September 2025 against a year earlier, the airport's year and the nation
| Measure | Sep 2025 | Sep 2024 | PWM, 12 months to Jul 2026 | All reported flights, Sep 2025 |
|---|---|---|---|---|
| Departed on time | 87.8% | 88.2% | 80.0% | 83.1% |
| Arrived on time | 84.7% | 85.7% | 78.2% | 82.8% |
| Cancelled | 0.6% | 0.1% | 2.6% | 0.5% |
| Average departure delay (late minutes only) | 11.3 min | 12.4 min | 17.2 min | 12.2 min |
| Scheduled departures a day | 40 | 47 | 30 | 18,748 |
| Scheduled departures | 1,202 | 1,395 | 10,925 | 562,439 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 356 | 30% | 84.3% | 1.0 min | 1.7% |
| AA American Airlines | 267 | 22% | 85.0% | 2.6 min | 0.0% |
| WN Southwest Airlines | 181 | 15% | 91.2% | 1.7 min | 0.0% |
| DL Delta Air Lines | 151 | 13% | 90.1% | 0.0 min | 0.0% |
| UA United Airlines | 90 | 7% | 76.7% | 12.3 min | 1.1% |
| OH PSA Airlines | 62 | 5% | 75.8% | 25.2 min | 0.0% |
| B6 JetBlue Airways | 49 | 4% | 89.8% | 0.2 min | 0.0% |
| OO SkyWest Airlines | 46 | 4% | 65.2% | 9.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| PWM–ORD | Portland to Chicago | 165 | 75.8% | 7.7 min | 1.2% |
| PWM–BWI | Portland to Baltimore | 121 | 90.9% | 3.7 min | 0.0% |
| PWM–DCA | Portland to Washington | 116 | 74.1% | 17.7 min | 0.0% |
| PWM–EWR | Portland to Newark | 116 | 83.6% | -1.7 min | 2.6% |
| PWM–PHL | Portland to Philadelphia | 102 | 84.3% | -1.2 min | 0.0% |
| PWM–IAD | Portland to Washington | 94 | 83.0% | 0.7 min | 1.1% |
| PWM–LGA | Portland to New York | 86 | 87.2% | 4.6 min | 1.2% |
| PWM–CLT | Portland to Charlotte | 81 | 90.1% | 8.8 min | 0.0% |
| PWM–ATL | Portland to Atlanta | 61 | 90.2% | 3.2 min | 0.0% |
| PWM–DTW | Portland to Detroit | 60 | 85.0% | 3.8 min | 0.0% |
| PWM–JFK | Portland to New York | 49 | 89.8% | 0.2 min | 0.0% |
| PWM–BNA | Portland to Nashville | 30 | 90.0% | -2.5 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left PWM on time in September 2025?
87.8% of 1,202 scheduled domestic departures left less than 15 minutes late, and 84.7% reached their destination on time. The national figures that month were 83.1% and 82.8%.
How does that compare with a year earlier?
In September 2024, 88.2% of 1,395 departures left on time and 0.1% were cancelled, against 87.8% and 0.6% in September 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for PWM · methodology · corrections.