Portsmouth International Airport at Pease (PSM): Delays & On-Time Performance
Data through July 2026
Portsmouth International Airport at Pease (PSM) in Portsmouth, NH is a middle-of-the-pack performer: 78% of departures are on time, within a few points of the national 78%. It hosts 1 airlines flying 1 departures a day to 4 destinations, with cancellations at 0.8%.
- Departures on-time
- 78%
- left <15 min late
- Avg dep delay
- 22 min
- Arrivals on-time
- 84%
- Cancelled
- 0.8%
- Destinations
- 4
- nonstop
- Airlines
- 1
Plan your departure from PSM
The choices most likely to improve your odds, based on this airport’s historical record.
- Best departure time
- Around 11 a.m.
- 89% on-time
- Best day to fly
- Friday
- 89% on-time
- Cancellation risk
- 0.8%
- below the US average
Monthly on-time trend
Best time of day to depart from PSM
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 33 min |
| Tuesday | 83% | 14 min |
| Wednesday | 78% | 18 min |
| Thursday | 80% | 17 min |
| Fridaybest | 89% | 18 min |
| Saturday | 71% | 17 min |
| Sunday | 63% | 43 min |
Busiest routes from PSM
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| PSM → PGD (Punta Gorda) | 237 | 80% | 22 min |
| PSM → SFB (Sanford) | 136 | 70% | 32 min |
Where flights into PSM come from
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| PGD (Punta Gorda) → PSM | 237 | 88% | 9 min |
| SFB (Sanford) → PSM | 136 | 78% | 15 min |
What causes delays at PSM
Share of total delay minutes by cause, as reported by carriers to the US DOT, weighted across routes departing PSM.
- Late-arriving aircraft36%
- Airline operations28%
- National airspace system26%
- Weather9%
Alternative airports near Portsmouth
Other airports within 120 miles, compared on departure reliability.
| Airport | Distance | On-time departures | Avg delay |
|---|---|---|---|
| MHT — Manchester-Boston Regional Airport | 33 mi | 82% | 16 min |
| PWM — Portland International Jetport | 47 mi | 82% | 18 min |
| BOS — Boston Logan International Airport | 50 mi | 78% | 17 min |
| ORH — Worcester Regional Airport | 77 mi | 78% | 23 min |
| PVD — Rhode Island T. F. Green International Airport | 98 mi | 81% | 16 min |
Compare the airport-level record first, then check the exact route you plan to book.
Frequently asked questions
- How often are flights delayed at PSM?
- 22% of departures from Portsmouth International Airport at Pease left 15+ minutes late between 2024-07 and 2026-07, with an average departure delay of 22 minutes. The national on-time average over the same period was 78%.
- What is the best time of day to depart from PSM?
- Flights scheduled around 11 a.m. depart on time 89% of the time at PSM, versus 68% around 7 p.m.. Booking before noon is the usual rule of thumb here.
- How often are flights cancelled at PSM?
- 0.8% of scheduled departures from PSM were cancelled in this period, compared with a national rate of 1.6%.
Popular route pages from this airport
Related guides
Based on 948 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.