OnTimeStats

Historical on-time performance

Houston to San Francisco

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

Flights on IAH–SFO arrive on time 79% of the time over the last 12 months.

On-time rate79%arrived within 15 min
Median delayon timetypical arrival
p90 delay40 min1 in 10 flights is worsetail risk
Cancelled0.7%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-time79%
    Medianon time
    p9040 min
    Cancel0.7%
    Flights3,444

Why flights run late

Delay causes

  • Airline33%
  • Weather10%
  • Air traffic (NAS)27%
  • Late aircraft31%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

Advertisement

Keep exploring

Related pages

Delay predictorfor this route→IAH airportHouston→SFO airportSan Francisco→Frontier Airlines on this routecarrier detail→Frontier 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.