OnTimeStats

Historical on-time performance

Las Vegas to Buffalo

1,987 miData through Dec 2025Source: US DOT · BTS

Flights on LAS–BUF arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 298 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time74%
    Medianon time
    p9050 min
    Cancel0.0%
    Flights298

Why flights run late

Delay causes

  • Airline47%
  • Weather0%
  • Air traffic (NAS)9%
  • Late aircraft41%
  • Security3%

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 LAS → BUF

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 46% to 82% on time.

  • Mornings82% on time · p90 30 min · 246 flights
  • Middays78% on time · p90 40 min · 397 flights
  • Afternoons61% on time · p90 60 min · 148 flights · limited
  • Evenings46% on time · p90 85 min · 65 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 55% to 87% on time.

  • Wednesdays87% on time · p90 20 min · 113 flights · limited
  • Tuesdays82% on time · p90 30 min · 114 flights · limited
  • Saturdays78% on time · p90 35 min · 142 flights · limited
  • Mondays75% on time · p90 35 min · 122 flights · limited
  • Fridays71% on time · p90 65 min · 121 flights · limited
  • Thursdays68% on time · p90 45 min · 120 flights · limited
  • Sundays55% on time · p90 50 min · 127 flights · limited
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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.