PWM · Portland International Jetport
Portland, ME. All airports.
Share of flights 15+ min late, by month
departures
arrivals
usual for the month (departures)
Jan 2015 → Jul 2026; gridlines 10/20/30/40%
Recent months — departures
| Month | Flights | Late 15+ | vs usual | Cancelled | Avg min | Main cause |
|---|---|---|---|---|---|---|
| Jul 2026 | 1,251 | 26.6% | +0.9 | 5.7% | 28 | Air traffic |
| Jun 2026 | 1,201 | 18.8% | -3.4 | 2.2% | 23 | Airline |
| May 2026 | 1,056 | 13.5% | -1.5 | 0.9% | 10 | Late aircraft |
| Apr 2026 | 720 | 16.2% | +2.9 | 1.4% | 17 | Airline |
| Mar 2026 | 641 | 19.7% | +6.0 | 4.4% | 24 | Airline |
| Feb 2026 | 521 | 17.2% | +4.6 | 6.3% | 14 | Late aircraft |
| Jan 2026 | 556 | 18.9% | +1.8 | 7.7% | 19 | Airline |
| Dec 2025 | 546 | 23.6% | +5.7 | 2.2% | 21 | Airline |
| Nov 2025 | 656 | 18.2% | +6.2 | 3.0% | 13 | Air traffic |
| Oct 2025 | 1,266 | 16.1% | +0.3 | 0.6% | 14 | Airline |
| Sep 2025 | 1,202 | 11.7% | -5.5 | 0.6% | 11 | Late aircraft |
| Aug 2025 | 1,309 | 17.6% | -5.8 | 1.3% | 14 | Late aircraft |
| Jul 2025 | 1,275 | 28.5% | +4.0 | 6.1% | 31 | Late aircraft |
| Jun 2025 | 1,139 | 26.3% | +4.3 | 1.8% | 25 | Late aircraft |
| May 2025 | 987 | 15.0% | -1.3 | 1.8% | 15 | Air traffic |
| Apr 2025 | 782 | 10.4% | -4.2 | 0.4% | 11 | Airline |
| Mar 2025 | 549 | 13.8% | -0.6 | 0.9% | 15 | Air traffic |
| Feb 2025 | 477 | 18.8% | +6.2 | 6.3% | 16 | Air traffic |
| Jan 2025 | 562 | 15.2% | -1.8 | 4.3% | 21 | Airline |
| Dec 2024 | 785 | 17.0% | -0.9 | 0.5% | 20 | Airline |
| Nov 2024 | 827 | 13.8% | +1.8 | 0.0% | 10 | Airline |
| Oct 2024 | 1,307 | 15.8% | +0.3 | 0.2% | 15 | Airline |
| Sep 2024 | 1,395 | 11.7% | -5.5 | 0.1% | 12 | Airline |
| Aug 2024 | 1,465 | 22.6% | -0.8 | 4.5% | 19 | Late aircraft |
Airlines here, May 2025 (departures)
| Airline | Flights | Late | Canc. |
|---|---|---|---|
| SkyWest | 46 | 6.5% | 0.0% |
| Republic | 287 | 11.5% | 3.1% |
| United | 81 | 12.3% | 0.0% |
| American | 123 | 15.7% | 1.6% |
| Southwest | 119 | 16.0% | 0.0% |
| PSA | 143 | 16.8% | 4.2% |
| Delta | 85 | 22.4% | 0.0% |
| JetBlue | 60 | 27.1% | 1.7% |
Airlines with 30+ departures that month.
Worst days on record
| Date | Flights | Late | Canc. |
|---|---|---|---|
| 2024-06-23 | 50 | 51% | 10% |
| 2024-08-19 | 50 | 48% | 16% |
| 2024-06-30 | 50 | 36% | 12% |
| 2024-08-30 | 50 | 27% | 2% |
| 2024-08-22 | 50 | 16% | 0% |
| 2024-08-29 | 50 | 12% | 4% |
| 2024-06-16 | 50 | 12% | 2% |
| 2024-09-08 | 50 | 14% | 0% |
| 2024-08-25 | 51 | 12% | 2% |
| 2024-08-23 | 50 | 8% | 0% |
| 2024-08-11 | 51 | 6% | 0% |
Departures; ranked by share late or cancelled.
FAA programs, last 90 days
None recorded.