OnTimeStats

Historical on-time performance

Atlanta to Grand Rapids

640 miData through Dec 2025Source: US DOT · BTS

Flights on ATL–GRR arrive on time 82% of the time over the last 12 months.

On-time rate82%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 1,381 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time82%
    Medianon time
    p9035 min
    Cancel1.1%
    Flights1,381

Why flights run late

Delay causes

  • Airline45%
  • Weather14%
  • Air traffic (NAS)14%
  • Late aircraft27%
  • Security0%

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 ATL → GRR

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 76% to 86% on time.

  • Middays86% on time · p90 20 min · 786 flights
  • Mornings85% on time · p90 20 min · 1,061 flights
  • Afternoons82% on time · p90 30 min · 919 flights
  • Evenings79% on time · p90 40 min · 268 flights
  • Overnights76% on time · p90 50 min · 1,122 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 86% on time.

  • Wednesdays86% on time · p90 25 min · 576 flights
  • Tuesdays85% on time · p90 20 min · 593 flights
  • Mondays84% on time · p90 25 min · 614 flights
  • Saturdays83% on time · p90 30 min · 488 flights
  • Thursdays82% on time · p90 30 min · 642 flights
  • Sundays77% on time · p90 40 min · 638 flights
  • Fridays76% on time · p90 40 min · 605 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.