Airports › Portland (PWM) › May 2025
Airport month · May 2025
Portland International Jetport in May 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 May 2025, reporting carriers scheduled 987 domestic departures from Portland International Jetport (PWM). 83.5% left less than 15 minutes late and 78.2% reached their destination on time; 1.8% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so PWM departures were 6.8 points above the national departure figure.
A year earlier, in May 2024, the airport had 855 departures with 82.1% leaving on time: a change of +1.4 points, with flights up 15%.
Flights arriving at PWM that month were on time 77.6% of the time (983 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 33%, late-arriving aircraft 31% and air carrier 29%.
- On time 78.2%
- Arrived 15+ minutes late 19.9%
- Cancelled 1.8%
- Diverted 0.1%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | PWM, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 83.5% | 82.1% | 80.0% | 76.7% |
| Arrived on time | 78.2% | 82.2% | 78.2% | 75.4% |
| Cancelled | 1.8% | 1.8% | 2.6% | 1.0% |
| Average departure delay (late minutes only) | 14.5 min | 16.8 min | 17.2 min | 17.5 min |
| Scheduled departures a day | 33 | 29 | 30 | 20,188 |
| Scheduled departures | 987 | 855 | 10,925 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| YX Republic Airline | 287 | 29% | 78.4% | 2.9 min | 3.1% |
| OH PSA Airlines | 143 | 14% | 69.9% | 21.9 min | 4.2% |
| AA American Airlines | 123 | 12% | 73.2% | 20.6 min | 1.6% |
| WN Southwest Airlines | 119 | 12% | 83.2% | 7.4 min | 0.0% |
| DL Delta Air Lines | 85 | 9% | 78.8% | 0.6 min | 0.0% |
| UA United Airlines | 81 | 8% | 84.0% | 0.7 min | 0.0% |
| B6 JetBlue Airways | 60 | 6% | 75.0% | 13.8 min | 1.7% |
| OO SkyWest Airlines | 46 | 5% | 89.1% | -1.8 min | 0.0% |
| MQ Envoy Air | 27 | 3% | 96.3% | -4.5 min | 0.0% |
| F9 Frontier Airlines | 16 | 2% | 68.8% | 0.3 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| PWM–IAD | Portland to Washington | 136 | 85.3% | -6.3 min | 1.5% |
| PWM–DCA | Portland to Washington | 119 | 64.7% | 45.1 min | 3.4% |
| PWM–BWI | Portland to Baltimore | 115 | 84.3% | 6.6 min | 0.0% |
| PWM–ORD | Portland to Chicago | 114 | 91.2% | -2.9 min | 0.0% |
| PWM–LGA | Portland to New York | 97 | 73.2% | 12.4 min | 2.1% |
| PWM–PHL | Portland to Philadelphia | 93 | 67.7% | 9.6 min | 4.3% |
| PWM–CLT | Portland to Charlotte | 62 | 90.3% | -4.6 min | 0.0% |
| PWM–JFK | Portland to New York | 60 | 75.0% | 13.8 min | 1.7% |
| PWM–DTW | Portland to Detroit | 56 | 89.3% | -7.3 min | 0.0% |
| PWM–ATL | Portland to Atlanta | 54 | 70.4% | 8.0 min | 0.0% |
| PWM–EWR | Portland to Newark | 51 | 68.6% | 5.6 min | 9.8% |
| PWM–MCO | Portland to Orlando | 16 | 68.8% | 0.3 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left PWM on time in May 2025?
83.5% of 987 scheduled domestic departures left less than 15 minutes late, and 78.2% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 82.1% of 855 departures left on time and 1.8% were cancelled, against 83.5% and 1.8% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.