Portland International Jetport (PWM) delays & on-time performance
Portland, Maine · 21 nonstop destinations · 10 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PWM right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
81%
arrived < 15 min late
Cancelled
2.6%
285 flights
Avg arrival delay
18 min
88 min when late
Departed on time
82%
avg taxi-out 16 min
Figures cover 10,925 departures from PWM; on-time is measured at arrival. Arrivals into PWM were on time 78% of the time.
Key facts
- Flights departing Portland International Jetport (PWM) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.6% were cancelled, and 7% arrived an hour or more late.
- Republic Airways was the most punctual airline here (83% on time); SkyWest Airlines was the least (67%).
- Departures scheduled around 8am did best (93% on time); around 5pm did worst (67%).
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (37%).
Most delayed routes from PWM
Lowest on-time arrival rates among regularly flown routes.
- DCA · Washington75%1,159 flts
- ORD · Chicago78%1,494 flts
- DTW · Detroit80%613 flts
- PHL · Philadelphia80%676 flts
- JFK · New York80%398 flts
- ATL · Atlanta81%642 flts
- LGA · New York82%1,183 flts
- CLT · Charlotte82%708 flts
- BWI · Baltimore83%1,342 flts
- EWR · Newark83%1,082 flts
Most reliable routes from PWM
Highest on-time arrival rates among regularly flown routes.
- IAD · Washington87%686 flts
- EWR · Newark83%1,082 flts
- BWI · Baltimore83%1,342 flts
- CLT · Charlotte82%708 flts
- LGA · New York82%1,183 flts
- ATL · Atlanta81%642 flts
- JFK · New York80%398 flts
- PHL · Philadelphia80%676 flts
- DTW · Detroit80%613 flts
- ORD · Chicago78%1,494 flts
Best airline at PWM
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Republic Airways | 83% | 4.0% | 15 min | 8 | 3,507 |
| Delta Air Lines | 82% | 1.1% | 18 min | 4 | 1,196 |
| Southwest Airlines | 82% | 0.8% | 11 min | 4 | 1,655 |
| Envoy Air | 82% | 4.1% | 19 min | 1 | 196 |
| American Airlines | 79% | 1.4% | 23 min | 5 | 1,963 |
| United Airlines | 79% | 1.5% | 18 min | 7 | 854 |
| JetBlue | 79% | 3.2% | 22 min | 3 | 431 |
| PSA Airlines | 76% | 6.5% | 30 min | 3 | 682 |
| SkyWest Airlines | 67% | 2.8% | 31 min | 3 | 436 |
| Frontier Airlines | 60% | 0.0% | 45 min | 1 | 5 |
Best time to fly out of PWM
On-time arrival rate by scheduled departure hour (local time).
- 5am90%914 flts
- 6am89%1,690 flts
- 7am87%692 flts
- 8am93%274 flts
- 9am90%338 flts
- 10am84%520 flts
- 11am86%584 flts
- 12pm80%994 flts
- 1pm78%556 flts
- 2pm75%780 flts
- 3pm73%914 flts
- 4pm72%836 flts
- 5pm67%1,081 flts
- 6pm72%318 flts
- 7pm80%363 flts
Monthly trend
Why departures were late
- Airline (crew, maintenance, cleaning, fueling)37%
- Late-arriving aircraft31%
- Air traffic control & airport congestion28%
- Extreme weather3%
- Security0%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.