OnTimeStats

Historical on-time performance

Las Vegas to Pittsburgh

1,910 miData through Dec 2025Source: US DOT · BTS

Flights on LAS–PIT 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)
Cancelled0.1%of scheduled flights

based on 673 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
    Cancel0.1%
    Flights673

Why flights run late

Delay causes

  • Airline40%
  • Weather0%
  • Air traffic (NAS)9%
  • Late aircraft51%
  • 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 → PIT

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 64% to 84% on time.

  • Mornings84% on time · p90 20 min · 751 flights
  • Overnights80% on time · p90 40 min · 287 flights
  • Middays71% on time · p90 45 min · 707 flights
  • Evenings69% on time · p90 55 min · 440 flights
  • Afternoons64% on time · p90 60 min · 432 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 66% to 84% on time.

  • Saturdays84% on time · p90 30 min · 372 flights
  • Wednesdays80% on time · p90 30 min · 339 flights
  • Tuesdays79% on time · p90 35 min · 340 flights
  • Sundays72% on time · p90 45 min · 406 flights
  • Fridays71% on time · p90 55 min · 386 flights
  • Thursdays71% on time · p90 45 min · 380 flights
  • Mondays66% on time · p90 45 min · 394 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.