OnTimeStats

Historical on-time performance

Baltimore to Las Vegas

2,106 miData through May 2026Source: US DOT · BTS

Flights on BWI–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)
Cancelled1.1%of scheduled flights

based on 1,829 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • Spirit Airlines
    On-time86%
    Medianon time
    p9025 min
    Cancel0.5%
    Flights194
  • Southwest Airlines
    On-time77%
    Medianon time
    p9035 min
    Cancel1.2%
    Flights1,635

Why flights run late

Delay causes

  • Airline31%
  • Weather11%
  • Air traffic (NAS)21%
  • Late aircraft36%
  • Security2%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline10%
  • Weather71%
  • Air traffic (NAS)19%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 21 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly BWI → LAS

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 89% on time.

  • Mornings89% on time · p90 15 min · 1,960 flights
  • Middays80% on time · p90 30 min · 992 flights
  • Afternoons71% on time · p90 50 min · 970 flights
  • Evenings66% on time · p90 60 min · 1,078 flights
  • Overnights58% on time · p90 75 min · 705 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.

  • Tuesdays80% on time · p90 30 min · 813 flights
  • Wednesdays78% on time · p90 40 min · 817 flights
  • Saturdays77% on time · p90 35 min · 729 flights
  • Mondays76% on time · p90 50 min · 838 flights
  • Thursdays75% on time · p90 40 min · 836 flights
  • Sundays75% on time · p90 40 min · 830 flights
  • Fridays73% on time · p90 50 min · 842 flights

Keep exploring

Related pages

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.