OnTimeStats

Historical on-time performance

Fort Myers to St. Louis

979 miData through Dec 2025Source: US DOT · BTS

Flights on RSW–STL arrive on time 80% of the time over the last 12 months.

On-time rate80%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights

based on 999 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time80%
    Medianon time
    p9035 min
    Cancel0.8%
    Flights999

Why flights run late

Delay causes

  • Airline14%
  • Weather0%
  • Air traffic (NAS)15%
  • Late aircraft71%
  • 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 RSW → 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 — 92% on time.

  • Mornings92% on time · p90 5 min · 1,081 flights
  • Middays73% on time · p90 45 min · 398 flights
  • Evenings65% on time · p90 55 min · 824 flights
  • Overnights64% on time · p90 75 min · 165 flights · limited
  • Afternoons62% on time · p90 85 min · 164 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 83% on time.

  • Fridays83% on time · p90 25 min · 368 flights
  • Tuesdays81% on time · p90 30 min · 350 flights
  • Thursdays79% on time · p90 30 min · 363 flights
  • Mondays76% on time · p90 40 min · 368 flights
  • Saturdays75% on time · p90 45 min · 424 flights
  • Wednesdays74% on time · p90 40 min · 344 flights
  • Sundays73% on time · p90 60 min · 415 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.