OnTimeStats

Historical on-time performance

Grand Rapids to Chicago

137 miData through May 2026Source: US DOT · BTS

Flights on GRR–ORD arrive on time 66% of the time over the last 12 months.

On-time rate66%arrived within 15 min
p90 delay75 min1 in 10 flights is worse (tail risk)
Cancelled2.6%of scheduled flights

based on 4,007 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • American Airlines
    On-time72%
    Medianon time
    p9065 min
    Cancel3.3%
    Flights456
  • Republic Airways
    On-time70%
    Medianon time
    p9060 min
    Cancel2.4%
    Flights673
  • Envoy Air
    On-time67%
    Medianon time
    p9060 min
    Cancel3.4%
    Flights953
  • United Airlines
    On-time65%
    Median5 min
    p9065 min
    Cancel1.3%
    Flights1,033
  • SkyWest Airlines
    On-time60%
    Medianon time
    p90115 min
    Cancel3.3%
    Flights892

Why flights run late

Delay causes

  • Airline30%
  • Weather11%
  • Air traffic (NAS)30%
  • Late aircraft29%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

  • Airline6%
  • Weather65%
  • Air traffic (NAS)30%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 105 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 GRR → ORD

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

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 58% to 80% on time.

  • Mornings80% on time · p90 35 min · 3,623 flights
  • Middays78% on time · p90 50 min · 2,644 flights
  • Afternoons67% on time · p90 80 min · 1,217 flights
  • Evenings58% on time · p90 70 min · 1,844 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 70% to 77% on time.

  • Saturdays77% on time · p90 40 min · 1,269 flights
  • Tuesdays76% on time · p90 50 min · 1,325 flights
  • Wednesdays75% on time · p90 40 min · 1,324 flights
  • Thursdays73% on time · p90 50 min · 1,379 flights
  • Mondays71% on time · p90 65 min · 1,379 flights
  • Sundays71% on time · p90 65 min · 1,340 flights
  • Fridays70% on time · p90 60 min · 1,387 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.