OnTimeStats

Historical on-time performance

Miami to Austin

1,103 miData through Dec 2025Source: US DOT · BTS

Flights on MIA–AUS arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights

based on 1,727 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • Delta Air Lines
    On-time74%
    Medianon time
    p9080 min
    Cancel0.0%
    Flights31
  • American Airlines
    On-time75%
    Medianon time
    p9055 min
    Cancel1.2%
    Flights1,421
  • Southwest Airlines
    On-time72%
    Medianon time
    p9040 min
    Cancel0.0%
    Flights275

Why flights run late

Delay causes

  • Airline34%
  • Weather6%
  • Air traffic (NAS)18%
  • Late aircraft42%
  • 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 MIA → AUS

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 — 87% on time.

  • Mornings87% on time · p90 15 min · 1,221 flights
  • Middays68% on time · p90 55 min · 929 flights
  • Afternoons68% on time · p90 75 min · 1,190 flights
  • Evenings67% on time · p90 75 min · 1,245 flights
  • Overnights66% on time · p90 75 min · 1,059 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 69% to 77% on time.

  • Tuesdays77% on time · p90 40 min · 804 flights
  • Wednesdays74% on time · p90 55 min · 785 flights
  • Mondays73% on time · p90 55 min · 810 flights
  • Fridays70% on time · p90 60 min · 802 flights
  • Thursdays70% on time · p90 65 min · 828 flights
  • Saturdays69% on time · p90 70 min · 773 flights
  • Sundays69% on time · p90 75 min · 842 flights
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Keep exploring

Related pages

Delay predictorfor this route→MIA airportMiami→AUS airportAustin→Republic Airways on this routecarrier detail→Republic Airwaysairline 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.