OnTimeStats

Historical on-time performance

Las Vegas to Grand Rapids

1,642 miData through Dec 2025Source: US DOT · BTS

Flights on LAS–GRR arrive on time 83% of the time over the last 12 months.

On-time rate83%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 121 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time83%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights121

Why flights run late

Delay causes

  • Airline15%
  • Weather4%
  • Air traffic (NAS)32%
  • 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 LAS → GRR

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 — 86% on time.

  • Mornings86% on time · p90 20 min · 306 flights
  • Middays77% on time · p90 35 min · 346 flights
  • Afternoons62% on time · p90 85 min · 323 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 70% to 79% on time.

  • Wednesdays79% on time · p90 20 min · 62 flights · limited
  • Sundays75% on time · p90 50 min · 212 flights
  • Mondays75% on time · p90 50 min · 216 flights
  • Thursdays74% on time · p90 45 min · 204 flights
  • Fridays70% on time · p90 60 min · 218 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.