OnTimeStats

Historical on-time performance

Las Vegas to Louisville

1,624 miData through Dec 2025Source: US DOT · BTS

Flights on LAS–SDF arrive on time 68% of the time over the last 12 months.

On-time rate68%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights

based on 308 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time68%
    Medianon time
    p9065 min
    Cancel0.6%
    Flights308

Why flights run late

Delay causes

  • Airline26%
  • Weather2%
  • Air traffic (NAS)5%
  • Late aircraft67%
  • 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 LAS → SDF

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 · 320 flights
  • Middays74% on time · p90 40 min · 340 flights
  • Evenings62% on time · p90 70 min · 274 flights
  • Overnights60% on time · p90 60 min · 339 flights
  • Afternoons56% on time · p90 75 min · 177 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 65% to 77% on time.

  • Wednesdays77% on time · p90 30 min · 201 flights
  • Saturdays76% on time · p90 30 min · 211 flights
  • Tuesdays71% on time · p90 60 min · 170 flights · limited
  • Mondays71% on time · p90 45 min · 207 flights
  • Thursdays66% on time · p90 60 min · 208 flights
  • Sundays66% on time · p90 75 min · 233 flights
  • Fridays65% on time · p90 65 min · 220 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.