OnTimeStats

Historical on-time performance

Denver to Knoxville

1,162 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–TYS arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights

based on 693 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time82%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights245
  • SkyWest Airlines
    On-time72%
    Medianon time
    p9050 min
    Cancel1.1%
    Flights448

Why flights run late

Delay causes

  • Airline28%
  • Weather8%
  • Air traffic (NAS)30%
  • Late aircraft35%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → TYS

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 69% to 84% on time.

  • Mornings84% on time · p90 25 min · 352 flights
  • Middays81% on time · p90 35 min · 1,125 flights
  • Afternoons79% on time · p90 35 min · 140 flights · limited
  • Evenings69% on time · p90 60 min · 1,188 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 79% on time.

  • Tuesdays79% on time · p90 35 min · 320 flights
  • Sundays77% on time · p90 55 min · 466 flights
  • Wednesdays77% on time · p90 40 min · 384 flights
  • Mondays75% on time · p90 40 min · 422 flights
  • Thursdays75% on time · p90 50 min · 459 flights
  • Fridays75% on time · p90 45 min · 410 flights
  • Saturdays74% on time · p90 55 min · 344 flights
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Methodology

A flight is on time when it arrives within 15 minutes of schedule — the US DOT / BTS standard. Median and p90(the “1-in-10 bad day”) are read from the full arrival-delay distribution, never averaged across periods.

Figures cover a carrier’s own BTS-coded flights. Cells below ~200 flights are flagged as limited data. All numbers are pre-computed from public BTS On-Time Performance data.