Sanford (SFB) to Knoxville (TYS): On-Time Performance
Data through July 2026
Sanford (SFB) to Knoxville (TYS) effectively runs on two schedules. In September 2025, 89% of arrivals were on time; in June 2025 that fell to 40% — a 49-point seasonal swing. Across the full period the route averages 65% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 58%), which matters most in the rough months.
- On-time
- 65%
- arrived <15 min late
- Avg delay
- 28 min
- completed flights
- Cancelled
- 1.1%
- Flights/day
- 1.8
- last 12 months
- Duration
- 1h 37m
- scheduled
- Distance
- 511 mi
Monthly on-time trend
Best time to fly from SFB to TYS
Aim for departures around 9 a.m. (90% on-time); avoid 12 p.m. departures (45%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 64% | 31 min |
| Tuesdaybest | 73% | 15 min |
| Wednesday | 68% | 18 min |
| Thursday | 70% | 20 min |
| Friday | 61% | 29 min |
| Saturday | 64% | 29 min |
| Sunday | 60% | 40 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations22%
- National airspace system11%
- Weather21%
Frequently asked questions
- How often are flights from SFB to TYS delayed?
- 35% of SFB–TYS 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 28 minutes.
- What is the best time of day to fly from SFB to TYS?
- Departures around 9 a.m. have the best record (90% on-time), while departures around 12 p.m. have the worst (45%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SFB to TYS?
- The scheduled SFB–TYS flight time averages 1h 37m over 511 miles. Actual arrival times vary — flights on this route land 15+ minutes late 35% of the time.
- How often are SFB to TYS flights cancelled?
- 1.1% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from SFB to TYS?
- June 2025 was the roughest month in this dataset, with only 40% of arrivals on time. The best was September 2025 at 89%. If your dates are flexible, that 49-point gap is worth planning around.
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Based on 1,336 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.