Philadelphia (PHL) to Knoxville (TYS): On-Time Performance
Data through May 2026
Philadelphia (PHL) to Knoxville (TYS) is a thinner route than most in this dataset — 327 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 73% arrived on time. Cancellations are the bigger caveat: 3.7% of scheduled flights never departed.
- On-time
- 73%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 3.7%
- Flights/day
- 0.90
- last 12 months
- Duration
- 2h 4m
- scheduled
- Distance
- 555 mi
Monthly on-time trend
Best time to fly from PHL to TYS
Aim for departures around 1 p.m. (85% on-time); avoid 6 p.m. departures (70%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 75% | 22 min |
| Tuesday | 74% | 24 min |
| Wednesdaybest | 82% | 14 min |
| Thursday | 71% | 20 min |
| Friday | 65% | 31 min |
| Saturday | 74% | 22 min |
| Sunday | 74% | 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 aircraft53%
- Airline operations19%
- National airspace system19%
- Weather10%
Frequently asked questions
- How often are flights from PHL to TYS delayed?
- 27% of PHL–TYS 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 PHL to TYS?
- Departures around 1 p.m. have the best record (85% on-time), while departures around 6 p.m. have the worst (70%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PHL to TYS?
- The scheduled PHL–TYS flight time averages 2h 4m over 555 miles. Actual arrival times vary — flights on this route land 15+ minutes late 27% of the time.
- How often are PHL to TYS flights cancelled?
- 3.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from PHL to TYS?
- December 2025 was the roughest month in this dataset, with only 47% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 43-point gap is worth planning around.
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Based on 828 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.