OnTimeStats

Historical on-time performance

Dallas to Las Vegas

1,067 miData through Dec 2025Source: US DOT · BTS

Flights on DAL–LAS arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights

based on 2,937 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
    p9035 min
    Cancel1.5%
    Flights2,937

Why flights run late

Delay causes

  • Airline28%
  • Weather4%
  • Air traffic (NAS)17%
  • Late aircraft50%
  • 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 DAL → LAS

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 — 90% on time.

  • Mornings90% on time · p90 10 min · 2,695 flights
  • Middays78% on time · p90 35 min · 1,946 flights
  • Afternoons71% on time · p90 50 min · 1,385 flights
  • Evenings65% on time · p90 55 min · 1,488 flights
  • Overnights60% on time · p90 70 min · 1,204 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 80% on time.

  • Saturdays80% on time · p90 30 min · 898 flights
  • Tuesdays80% on time · p90 30 min · 1,256 flights
  • Wednesdays78% on time · p90 35 min · 1,256 flights
  • Mondays76% on time · p90 35 min · 1,325 flights
  • Sundays74% on time · p90 45 min · 1,337 flights
  • Fridays73% on time · p90 45 min · 1,327 flights
  • Thursdays71% on time · p90 45 min · 1,319 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.