OnTimeStats

Historical on-time performance

Houston to Cincinnati

871 miData through Dec 2025Source: US DOT · BTS

Flights on IAH–CVG arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights

based on 497 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time71%
    Medianon time
    p9050 min
    Cancel0.8%
    Flights497

Why flights run late

Delay causes

  • Airline26%
  • Weather5%
  • Air traffic (NAS)13%
  • Late aircraft56%
  • 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 IAH → CVG

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 82% on time.

  • Middays82% on time · p90 40 min · 552 flights
  • Mornings80% on time · p90 55 min · 148 flights · limited
  • Afternoons67% on time · p90 70 min · 60 flights · limited
  • Evenings65% on time · p90 75 min · 579 flights
  • Overnights64% on time · p90 65 min · 562 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 65% to 76% on time.

  • Wednesdays76% on time · p90 55 min · 277 flights
  • Tuesdays75% on time · p90 50 min · 251 flights
  • Thursdays72% on time · p90 65 min · 277 flights
  • Fridays72% on time · p90 50 min · 280 flights
  • Saturdays71% on time · p90 65 min · 234 flights
  • Mondays66% on time · p90 65 min · 298 flights
  • Sundays65% on time · p90 70 min · 284 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.