OnTimeStats

Historical on-time performance

Atlanta to Knoxville

152 miData through Dec 2025Source: US DOT · BTS

Flights on ATL–TYS arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled1.7%of scheduled flights

based on 1,630 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time78%
    Medianon time
    p9040 min
    Cancel1.7%
    Flights1,630

Why flights run late

Delay causes

  • Airline55%
  • Weather8%
  • Air traffic (NAS)10%
  • Late aircraft27%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly ATL → 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 77% to 88% on time.

  • Mornings88% on time · p90 15 min · 931 flights
  • Middays87% on time · p90 20 min · 1,845 flights
  • Afternoons82% on time · p90 30 min · 1,036 flights
  • Evenings79% on time · p90 40 min · 1,285 flights
  • Overnights77% on time · p90 45 min · 1,636 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 86% on time.

  • Wednesdays86% on time · p90 20 min · 943 flights
  • Tuesdays85% on time · p90 25 min · 942 flights
  • Saturdays84% on time · p90 35 min · 781 flights
  • Thursdays83% on time · p90 30 min · 1,017 flights
  • Mondays83% on time · p90 30 min · 1,024 flights
  • Sundays79% on time · p90 35 min · 1,007 flights
  • Fridays78% on time · p90 35 min · 1,019 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.