OnTimeStats

Historical on-time performance

Denver to Cleveland

1,201 miData through May 2026Source: US DOT · BTS

Flights on DEN–CLE arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 1,607 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Frontier Airlines
    On-time84%
    Medianon time
    p9025 min
    Cancel1.1%
    Flights92
  • United Airlinesbest
    On-time80%
    Medianon time
    p9040 min
    Cancel0.1%
    Flights938
  • Southwest Airlines
    On-time62%
    Median5 min
    p9065 min
    Cancel0.3%
    Flights577

Why flights run late

Delay causes

  • Airline28%
  • Weather1%
  • Air traffic (NAS)14%
  • Late aircraft57%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline50%
  • Weather25%
  • Air traffic (NAS)25%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 4 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly DEN → CLE

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 65% to 85% on time.

  • Mornings85% on time · p90 20 min · 766 flights
  • Middays82% on time · p90 30 min · 2,124 flights
  • Afternoons76% on time · p90 45 min · 618 flights
  • Evenings65% on time · p90 65 min · 1,923 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 78% on time.

  • Wednesdays78% on time · p90 35 min · 747 flights
  • Tuesdays78% on time · p90 35 min · 803 flights
  • Sundays76% on time · p90 40 min · 839 flights
  • Thursdays75% on time · p90 40 min · 848 flights
  • Saturdays74% on time · p90 55 min · 639 flights
  • Mondays74% on time · p90 45 min · 817 flights
  • Fridays73% on time · p90 55 min · 820 flights

Keep exploring

Related pages

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.