OnTimeStats

Historical on-time performance

Louisville to Las Vegas

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

Flights on SDF–LAS arrive on time 87% of the time over the last 12 months.

On-time rate87%arrived within 15 min
p90 delay15 min1 in 10 flights is worse (tail risk)
Cancelled0.3%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-time87%
    Medianon time
    p9015 min
    Cancel0.3%
    Flights308

Why flights run late

Delay causes

  • Airline33%
  • Weather14%
  • Air traffic (NAS)25%
  • Late aircraft27%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly SDF → LAS

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 60% to 85% on time.

  • Middays85% on time · p90 20 min · 302 flights
  • Mornings84% on time · p90 20 min · 663 flights
  • Afternoons78% on time · p90 35 min · 271 flights
  • Overnights64% on time · p90 80 min · 77 flights · limited
  • Evenings60% on time · p90 60 min · 138 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 81% on time.

  • Tuesdays81% on time · p90 35 min · 170 flights · limited
  • Thursdays81% on time · p90 30 min · 209 flights
  • Wednesdays81% on time · p90 25 min · 188 flights · limited
  • Sundays81% on time · p90 20 min · 233 flights
  • Fridays78% on time · p90 45 min · 219 flights
  • Saturdays78% on time · p90 30 min · 212 flights
  • Mondays77% on time · p90 35 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.