OnTimeStats

Historical on-time performance

Cleveland to Houston

1,091 miData through May 2026Source: US DOT · BTS

Flights on CLE–IAH arrive on time 89% of the time over the last 12 months.

On-time rate89%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights

based on 827 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time89%
    Medianon time
    p9015 min
    Cancel0.2%
    Flights827

Why flights run late

Delay causes

  • Airline39%
  • Weather1%
  • Air traffic (NAS)47%
  • Late aircraft13%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather100%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 2 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 CLE → IAH

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 75% to 91% on time.

  • Middays91% on time · p90 10 min · 372 flights
  • Mornings90% on time · p90 10 min · 1,146 flights
  • Afternoons84% on time · p90 20 min · 1,203 flights
  • Evenings75% on time · p90 50 min · 416 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 84% to 88% on time.

  • Wednesdays88% on time · p90 15 min · 449 flights
  • Thursdays87% on time · p90 15 min · 451 flights
  • Saturdays86% on time · p90 20 min · 422 flights
  • Tuesdays85% on time · p90 20 min · 434 flights
  • Fridays85% on time · p90 20 min · 464 flights
  • Sundays85% on time · p90 20 min · 453 flights
  • Mondays84% on time · p90 30 min · 464 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.