Knoxville (TYS) to St. Petersburg (PIE): On-Time Performance
Data through July 2026
The calendar drives reliability on TYS–PIE. May 2026 flights landed on schedule 90% of the time, but October 2025 dropped to 55% — a gap of 35 points. Across the full period the route averages 74% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 60%), which matters most in the rough months.
- On-time
- 74%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 1.4
- last 12 months
- Duration
- 1h 42m
- scheduled
- Distance
- 550 mi
Monthly on-time trend
Best time to fly from TYS to PIE
Aim for departures around 9 a.m. (90% on-time); avoid 9 p.m. departures (52%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 32 min |
| Tuesday | 77% | 10 min |
| Wednesday | 72% | 23 min |
| Thursdaybest | 83% | 8 min |
| Friday | 69% | 35 min |
| Saturday | 75% | 28 min |
| Sunday | 73% | 20 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 operations41%
- National airspace system14%
- Weather4%
- Security1%
Frequently asked questions
- How often are flights from TYS to PIE delayed?
- 26% of TYS–PIE 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 24 minutes.
- What is the best time of day to fly from TYS to PIE?
- Departures around 9 a.m. have the best record (90% on-time), while departures around 9 p.m. have the worst (52%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from TYS to PIE?
- The scheduled TYS–PIE flight time averages 1h 42m over 550 miles. Actual arrival times vary — flights on this route land 15+ minutes late 26% of the time.
- How often are TYS to PIE flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from TYS to PIE?
- October 2025 was the roughest month in this dataset, with only 55% of arrivals on time. The best was May 2026 at 90%. If your dates are flexible, that 35-point gap is worth planning around.
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Based on 1,106 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.