OnTimeStats

Historical on-time performance

St. Louis to Austin

722 miData through Dec 2025Source: US DOT · BTS

Flights on STL–AUS arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights

based on 969 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time78%
    Medianon time
    p9040 min
    Cancel0.7%
    Flights969

Why flights run late

Delay causes

  • Airline23%
  • Weather3%
  • Air traffic (NAS)19%
  • Late aircraft55%
  • 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 STL → AUS

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 66% to 88% on time.

  • Mornings88% on time · p90 15 min · 306 flights
  • Middays86% on time · p90 20 min · 946 flights
  • Afternoons72% on time · p90 55 min · 586 flights
  • Overnights71% on time · p90 50 min · 645 flights
  • Evenings66% on time · p90 50 min · 466 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 72% to 82% on time.

  • Tuesdays82% on time · p90 25 min · 418 flights
  • Mondays80% on time · p90 35 min · 453 flights
  • Wednesdays79% on time · p90 35 min · 417 flights
  • Fridays77% on time · p90 40 min · 449 flights
  • Saturdays77% on time · p90 35 min · 276 flights
  • Thursdays72% on time · p90 45 min · 450 flights
  • Sundays72% on time · p90 50 min · 486 flights
Advertisement

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.