Portsmouth (PSM) to Sanford (SFB): On-Time Performance
Data through May 2026
Portsmouth (PSM) to Sanford (SFB) is a thinner route than most in this dataset — 146 departures over the past year, roughly 3 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 71% arrived on time, noticeably below the national average of 78%.
- On-time
- 71%
- arrived <15 min late
- Avg delay
- 28 min
- completed flights
- Cancelled
- 1.0%
- Flights/day
- 0.40
- last 12 months
- Duration
- 3h 12m
- scheduled
- Distance
- 1,144 mi
Monthly on-time trend
Best time to fly from PSM to SFB
Aim for departures around 10 a.m. (73% on-time); avoid 8 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 71% | 151 min |
| Tuesday | 77% | 22 min |
| Wednesday | 80% | 13 min |
| Thursday | 77% | 18 min |
| Fridaybest | 100% | 1 min |
| Saturday | 55% | 28 min |
| Sunday | 69% | 34 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft40%
- Airline operations27%
- National airspace system14%
- Weather19%
Frequently asked questions
- How often are flights from PSM to SFB delayed?
- 29% of PSM–SFB flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 28 minutes.
- What is the best time of day to fly from PSM to SFB?
- Departures around 10 a.m. have the best record (73% on-time), while departures around 8 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PSM to SFB?
- The scheduled PSM–SFB flight time averages 3h 12m over 1,144 miles. Actual arrival times vary — flights on this route land 15+ minutes late 29% of the time.
- How often are PSM to SFB flights cancelled?
- 1% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
Explore related pages
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Based on 289 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.