OnTimeStats

Historical on-time performance

Charlotte to Denver

1,337 miData through Dec 2025Source: US DOT · BTS

Flights on CLT–DEN arrive on time 72% of the time over the last 12 months.

On-time rate72%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights

based on 2,586 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time79%
    Medianon time
    p9045 min
    Cancel0.4%
    Flights713
  • American Airlines
    On-time70%
    Medianon time
    p9060 min
    Cancel0.5%
    Flights1,721
  • Southwest Airlines
    On-time57%
    Median5 min
    p9090 min
    Cancel0.0%
    Flights152

Why flights run late

Delay causes

  • Airline30%
  • Weather4%
  • Air traffic (NAS)28%
  • Late aircraft37%
  • Security1%

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 CLT → DEN

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

Best time of day

Mornings are the most reliable time of day to fly this route — 85% on time.

  • Mornings85% on time · p90 20 min · 2,478 flights
  • Middays78% on time · p90 40 min · 1,731 flights
  • Afternoons69% on time · p90 60 min · 1,630 flights
  • Overnights58% on time · p90 75 min · 1,394 flights
  • Evenings58% on time · p90 85 min · 1,559 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 75% on time.

  • Wednesdays75% on time · p90 55 min · 1,178 flights
  • Tuesdays73% on time · p90 50 min · 1,158 flights
  • Fridays72% on time · p90 55 min · 1,313 flights
  • Saturdays72% on time · p90 55 min · 1,153 flights
  • Mondays71% on time · p90 55 min · 1,307 flights
  • Sundays70% on time · p90 60 min · 1,372 flights
  • Thursdays68% on time · p90 60 min · 1,311 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.