OnTimeStats

Historical on-time performance

St. Louis to Fort Lauderdale

1,056 miData through Dec 2025Source: US DOT · BTS

Flights on STL–FLL 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)
Cancelled0.8%of scheduled flights

based on 733 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
    Cancel0.8%
    Flights733

Why flights run late

Delay causes

  • Airline23%
  • Weather6%
  • Air traffic (NAS)20%
  • Late aircraft51%
  • 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 → FLL

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 — 86% on time.

  • Mornings86% on time · p90 20 min · 829 flights
  • Middays72% on time · p90 45 min · 270 flights
  • Evenings71% on time · p90 50 min · 644 flights
  • Afternoons67% on time · p90 55 min · 408 flights
  • Overnights62% on time · p90 65 min · 252 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 70% to 79% on time.

  • Tuesdays79% on time · p90 25 min · 285 flights
  • Wednesdays79% on time · p90 35 min · 230 flights
  • Mondays78% on time · p90 25 min · 257 flights
  • Thursdays75% on time · p90 45 min · 339 flights
  • Fridays74% on time · p90 50 min · 254 flights
  • Saturdays74% on time · p90 45 min · 525 flights
  • Sundays70% on time · p90 50 min · 513 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.