FlightRecord

Knoxville (TYS) to Sanford (SFB): On-Time Performance

Data through May 2026

When you fly TYS to SFB matters as much as anything else about the booking: the route swung from 89% on-time in September 2025 to just 42% in June 2025. Across the full period the route averages 72% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 65%), which matters most in the rough months.

On-time
72%
arrived <15 min late
Avg delay
24 min
completed flights
Cancelled
1.2%
Flights/day
1.8
last 12 months
Duration
1h 35m
scheduled
Distance
511 mi

Monthly on-time trend

Monthly on-time percentage for TYS to SFB flights50%75%100%June 2024: 78% on-time (58 flights)78Jun 2024July 2024: 58% on-time (63 flights)58August 2024: 78% on-time (47 flights)78September 2024: 71% on-time (48 flights)71Sep 2024October 2024: 80% on-time (55 flights)80November 2024: 78% on-time (50 flights)78December 2024: 76% on-time (67 flights)76Dec 2024January 2025: 76% on-time (53 flights)76February 2025: 72% on-time (47 flights)72March 2025: 82% on-time (62 flights)82Mar 2025April 2025: 84% on-time (49 flights)84May 2025: 65% on-time (51 flights)65June 2025: 42% on-time (52 flights)42Jun 2025July 2025: 49% on-time (53 flights)49August 2025: 65% on-time (52 flights)65September 2025: 89% on-time (47 flights)89Sep 2025October 2025: 68% on-time (57 flights)68November 2025: 75% on-time (60 flights)75December 2025: 75% on-time (67 flights)75Dec 2025January 2026: 58% on-time (53 flights)58February 2026: 83% on-time (47 flights)83March 2026: 78% on-time (59 flights)78Mar 2026April 2026: 86% on-time (44 flights)86May 2026: 59% on-time (49 flights)59

Best time to fly from TYS to SFB

Aim for departures around 8 a.m. (93% on-time); avoid 10 p.m. departures (39%).

On-time percentage by scheduled departure hour, TYS to SFB6 a.m.: 89% on-time (96 flights)67 a.m.: 90% on-time (42 flights)78 a.m.: 93% on-time (85 flights)89 a.m.: 86% on-time (55 flights)910 a.m.: 83% on-time (23 flights)1011 a.m.: 77% on-time (58 flights)1112 p.m.: 78% on-time (123 flights)121 p.m.: 76% on-time (96 flights)132 p.m.: 67% on-time (70 flights)143 p.m.: 53% on-time (154 flights)154 p.m.: 67% on-time (60 flights)165 p.m.: 65% on-time (95 flights)176 p.m.: 75% on-time (138 flights)187 p.m.: 59% on-time (86 flights)199 p.m.: 68% on-time (51 flights)2110 p.m.: 39% on-time (47 flights)22scheduled departure hour

By day of week

DayOn-timeAvg delay
Monday74%31 min
Tuesdaybest79%13 min
Wednesday78%16 min
Thursday78%13 min
Friday70%27 min
Saturday68%30 min
Sunday62%30 min

What causes delays on this route

Share of total delay minutes by cause, as reported by carriers to the US DOT.

  • Late-arriving aircraft57%
  • Airline operations18%
  • National airspace system16%
  • Weather10%

Frequently asked questions

How often are flights from TYS to SFB delayed?
28% of TYS–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 24 minutes.
What is the best time of day to fly from TYS to SFB?
Departures around 8 a.m. have the best record (93% on-time), while departures around 10 p.m. have the worst (39%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
How long is the flight from TYS to SFB?
The scheduled TYS–SFB flight time averages 1h 35m over 511 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
How often are TYS to SFB flights cancelled?
1.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
What is the worst month to fly from TYS to SFB?
June 2025 was the roughest month in this dataset, with only 42% of arrivals on time. The best was September 2025 at 89%. If your dates are flexible, that 47-point gap is worth planning around.

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Based on 1,290 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.