OnTimeStats

Historical on-time performance

Chicago to Grand Rapids

137 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–GRR arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.7%of scheduled flights

based on 3,392 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airwaysbest
    On-time83%
    Medianon time
    p9025 min
    Cancel1.4%
    Flights838
  • SkyWest Airlines
    On-time69%
    Medianon time
    p9080 min
    Cancel2.1%
    Flights829
  • Envoy Air
    On-time74%
    Medianon time
    p9040 min
    Cancel3.0%
    Flights637
  • United Airlines
    On-time67%
    Medianon time
    p9070 min
    Cancel0.9%
    Flights770
  • American Airlines
    On-time66%
    Medianon time
    p9065 min
    Cancel1.3%
    Flights318

Why flights run late

Delay causes

  • Airline32%
  • Weather7%
  • Air traffic (NAS)17%
  • Late aircraft43%
  • 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 ORD → 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 65% to 83% on time.

  • Middays83% on time · p90 30 min · 1,776 flights
  • Mornings81% on time · p90 30 min · 1,671 flights
  • Afternoons73% on time · p90 55 min · 1,944 flights
  • Evenings72% on time · p90 55 min · 1,356 flights
  • Overnights65% on time · p90 75 min · 1,863 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 71% to 79% on time.

  • Tuesdays79% on time · p90 40 min · 1,211 flights
  • Saturdays76% on time · p90 45 min · 1,163 flights
  • Mondays75% on time · p90 50 min · 1,269 flights
  • Wednesdays75% on time · p90 55 min · 1,220 flights
  • Thursdays75% on time · p90 50 min · 1,251 flights
  • Fridays73% on time · p90 65 min · 1,255 flights
  • Sundays71% on time · p90 60 min · 1,241 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.