OnTimeStats

Historical on-time performance

San Francisco to Houston

1,635 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–IAH arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min
Median delayon timetypical arrival
p90 delay20 min1 in 10 flights is worsetail risk
Cancelled0.6%of scheduled flights

based on 3,444 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time84%
    Medianon time
    p9020 min
    Cancel0.6%
    Flights3,444

Why flights run late

Delay causes

  • Airline33%
  • Weather1%
  • Air traffic (NAS)29%
  • Late aircraft37%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→SFO airportSan Francisco→IAH airportHouston→Continental Airlines on this routecarrier detail→Continental Airlinesairline profile→

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.