Knoxville (TYS) to St. Petersburg (PIE): On-Time Performance
Data through May 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 75% on-time against a national 78%. Morning departures also hold up better than evening ones (85% vs 62%), which matters most in the rough months.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 22 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 (53%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 26 min |
| Tuesday | 74% | 13 min |
| Wednesday | 70% | 24 min |
| Thursdaybest | 81% | 9 min |
| Friday | 71% | 32 min |
| Saturday | 76% | 29 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 aircraft41%
- Airline operations37%
- National airspace system15%
- Weather5%
- Security1%
Frequently asked questions
- How often are flights from TYS to PIE delayed?
- 25% of TYS–PIE 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 22 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 (53%). 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 25% of the time.
- How often are TYS to PIE flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, 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 1,059 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.