OnTimeStats

Historical on-time performance

Fort Lauderdale to St. Louis

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

Flights on FLL–STL arrive on time 81% of the time over the last 12 months.

On-time rate81%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights

based on 735 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time81%
    Medianon time
    p9040 min
    Cancel0.7%
    Flights735

Why flights run late

Delay causes

  • Airline36%
  • Weather5%
  • Air traffic (NAS)17%
  • 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 FLL → 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 — 91% on time.

  • Mornings91% on time · p90 10 min · 925 flights
  • Middays77% on time · p90 35 min · 302 flights
  • Afternoons61% on time · p90 75 min · 339 flights
  • Evenings60% on time · p90 65 min · 715 flights
  • Overnights52% on time · p90 85 min · 122 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 68% to 80% on time.

  • Tuesdays80% on time · p90 35 min · 285 flights
  • Wednesdays78% on time · p90 35 min · 230 flights
  • Thursdays76% on time · p90 40 min · 339 flights
  • Mondays75% on time · p90 40 min · 259 flights
  • Fridays73% on time · p90 45 min · 253 flights
  • Saturdays73% on time · p90 50 min · 524 flights
  • Sundays68% on time · p90 65 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.