OnTimeStats

Historical on-time performance

Houston to St. Louis

687 miData through Dec 2025Source: US DOT · BTS

Flights on HOU–STL arrive on time 83% of the time over the last 12 months.

On-time rate83%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled1.2%of scheduled flights

based on 1,537 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time83%
    Medianon time
    p9025 min
    Cancel1.2%
    Flights1,537

Why flights run late

Delay causes

  • Airline33%
  • Weather4%
  • Air traffic (NAS)12%
  • Late aircraft50%
  • 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 HOU → STL

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

Mornings are the most reliable time of day to fly this route — 93% on time.

  • Mornings93% on time · p90 5 min · 1,793 flights
  • Middays83% on time · p90 25 min · 516 flights
  • Afternoons81% on time · p90 35 min · 548 flights
  • Evenings75% on time · p90 45 min · 827 flights
  • Overnights72% on time · p90 50 min · 824 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 80% to 87% on time.

  • Saturdays87% on time · p90 20 min · 468 flights
  • Tuesdays86% on time · p90 20 min · 641 flights
  • Wednesdays84% on time · p90 30 min · 629 flights
  • Thursdays84% on time · p90 25 min · 686 flights
  • Fridays82% on time · p90 25 min · 698 flights
  • Mondays82% on time · p90 25 min · 701 flights
  • Sundays80% on time · p90 30 min · 685 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.