Portsmouth International Airport at Pease (PSM) delays & on-time performance
Portsmouth, New Hampshire · 4 nonstop destinations · 1 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at PSM right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
76%
arrived < 15 min late
Cancelled
0.7%
3 flights
Avg arrival delay
26 min
103 min when late
Departed on time
77%
avg taxi-out 17 min
Figures cover 430 departures from PSM; on-time is measured at arrival. Arrivals into PSM were on time 83% of the time.
Key facts
- Flights departing Portsmouth International Airport at Pease (PSM) arrived on time 76% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.7% were cancelled, and 10% arrived an hour or more late.
- Departures scheduled around 9am did best (92% on time); around 7pm did worst (68%).
- The largest source of delay minutes was late-arriving aircraft (35%).
Most delayed routes from PSM
Lowest on-time arrival rates among regularly flown routes.
Most reliable routes from PSM
Highest on-time arrival rates among regularly flown routes.
Best airline at PSM
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Allegiant Air | 76% | 0.7% | 26 min | 4 | 430 |
Best time to fly out of PSM
On-time arrival rate by scheduled departure hour (local time).
- 9am92%36 flts
- 10am74%43 flts
- 11am85%71 flts
- 12pm74%42 flts
- 1pm88%41 flts
- 6pm72%77 flts
- 7pm68%72 flts
Monthly trend
Why departures were late
- Late-arriving aircraft35%
- Air traffic control & airport congestion30%
- Airline (crew, maintenance, cleaning, fueling)30%
- Extreme weather5%
- 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.