OnTimeStats

Historical on-time performance

San Antonio to Miami

1,143 miData through Dec 2025Source: US DOT · BTS

Flights on SAT–MIA arrive on time 86% of the time over the last 12 months.

On-time rate86%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled1.8%of scheduled flights

based on 437 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlinesbest
    On-time90%
    Medianon time
    p905 min
    Cancel2.0%
    Flights345
  • Envoy Air
    On-time72%
    Medianon time
    p9045 min
    Cancel1.1%
    Flights92

Why flights run late

Delay causes

  • Airline28%
  • Weather8%
  • Air traffic (NAS)11%
  • Late aircraft53%
  • 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 SAT → MIA

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 — 89% on time.

  • Mornings89% on time · p90 10 min · 1,097 flights
  • Evenings71% on time · p90 50 min · 215 flights
  • Afternoons64% on time · p90 65 min · 182 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 88% on time.

  • Tuesdays88% on time · p90 10 min · 211 flights
  • Mondays86% on time · p90 20 min · 220 flights
  • Thursdays85% on time · p90 20 min · 212 flights
  • Fridays83% on time · p90 25 min · 217 flights
  • Sundays81% on time · p90 25 min · 216 flights
  • Wednesdays80% on time · p90 25 min · 211 flights
  • Saturdays78% on time · p90 40 min · 230 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.