Sanford (SFB) to Portsmouth (PSM): On-Time Performance
Data through July 2026
Sanford (SFB) to Portsmouth (PSM) is a thinner route than most in this dataset — 136 departures over the past year, roughly 3 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 78% arrived on time.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 0.37
- last 12 months
- Duration
- 2h 49m
- scheduled
- Distance
- 1,144 mi
Monthly on-time trend
Best time to fly from SFB to PSM
Aim for departures around 8 a.m. (93% on-time); avoid 4 p.m. departures (65%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 6 min |
| Tuesday | 73% | 7 min |
| Wednesday | 60% | 13 min |
| Thursday | 81% | 16 min |
| Fridaybest | 86% | 2 min |
| Saturday | 77% | 17 min |
| Sunday | 77% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft6%
- Airline operations50%
- National airspace system15%
- Weather29%
Frequently asked questions
- How often are flights from SFB to PSM delayed?
- 22% of SFB–PSM flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- What is the best time of day to fly from SFB to PSM?
- Departures around 8 a.m. have the best record (93% on-time), while departures around 4 p.m. have the worst (65%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFB to PSM?
- The scheduled SFB–PSM flight time averages 2h 49m over 1,144 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are SFB to PSM flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
Explore related pages
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Related guides
Based on 297 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.