Philadelphia (PHL) to Knoxville (TYS): On-Time Performance
Data through July 2026
Philadelphia (PHL) to Knoxville (TYS) is a thinner route than most in this dataset — 344 departures over the past year, roughly 7 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 70% arrived on time, noticeably below the national average of 78%. Cancellations are the bigger caveat: 3.9% of scheduled flights never departed.
- On-time
- 70%
- arrived <15 min late
- Avg delay
- 27 min
- completed flights
- Cancelled
- 3.9%
- Flights/day
- 0.94
- 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 5 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 26 min |
| Tuesday | 75% | 28 min |
| Wednesdaybest | 80% | 17 min |
| Thursday | 62% | 30 min |
| Friday | 65% | 31 min |
| Saturday | 73% | 23 min |
| Sunday | 68% | 33 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 operations20%
- National airspace system18%
- Weather9%
Frequently asked questions
- How often are flights from PHL to TYS delayed?
- 30% of PHL–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 27 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 5 p.m. have the worst (57%). 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 30% of the time.
- How often are PHL to TYS flights cancelled?
- 3.9% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What is the worst month to fly from PHL to TYS?
- July 2026 was the roughest month in this dataset, with only 42% of arrivals on time. The best was November 2024 at 90%. If your dates are flexible, that 48-point gap is worth planning around.
Explore related pages
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Related guides
Based on 863 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.