OnTimeStats

Historical on-time performance

Denver to Jacksonville

1,447 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–JAX arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 915 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time74%
    Medianon time
    p9040 min
    Cancel0.0%
    Flights570
  • Southwest Airlines
    On-time68%
    Median5 min
    p9045 min
    Cancel0.6%
    Flights345

Why flights run late

Delay causes

  • Airline28%
  • Weather2%
  • Air traffic (NAS)26%
  • Late aircraft45%
  • 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 → JAX

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 64% to 79% on time.

  • Mornings79% on time · p90 35 min · 521 flights
  • Middays76% on time · p90 30 min · 470 flights
  • Afternoons71% on time · p90 40 min · 339 flights
  • Evenings64% on time · p90 60 min · 1,258 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 67% to 73% on time.

  • Wednesdays73% on time · p90 45 min · 354 flights
  • Tuesdays72% on time · p90 50 min · 352 flights
  • Mondays70% on time · p90 45 min · 384 flights
  • Thursdays70% on time · p90 40 min · 359 flights
  • Saturdays69% on time · p90 45 min · 388 flights
  • Fridays69% on time · p90 50 min · 378 flights
  • Sundays67% on time · p90 50 min · 375 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.