OnTimeStats

Historical on-time performance

Milwaukee to Chicago

67 miData through May 2026Source: US DOT · BTS

Flights on MKE–ORD arrive on time 64% of the time over the last 12 months.

On-time rate64%arrived within 15 min
p90 delay95 min1 in 10 flights is worse (tail risk)
Cancelled4.1%of scheduled flights

based on 4,995 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.

  • Envoy Air
    On-time75%
    Medianon time
    p9050 min
    Cancel5.0%
    Flights40
  • Republic Airways
    On-time68%
    Medianon time
    p9070 min
    Cancel13.3%
    Flights60
  • SkyWest Airlines
    On-time64%
    Medianon time
    p90100 min
    Cancel4.0%
    Flights4,895

Why flights run late

Delay causes

  • Airline48%
  • Weather11%
  • Air traffic (NAS)20%
  • Late aircraft21%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline3%
  • Weather81%
  • Air traffic (NAS)15%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 204 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 MKE → ORD

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 — 77% on time.

  • Mornings77% on time · p90 60 min · 4,538 flights
  • Middays73% on time · p90 65 min · 2,764 flights
  • Afternoons66% on time · p90 90 min · 1,634 flights
  • Evenings53% on time · p90 100 min · 1,413 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 66% to 74% on time.

  • Wednesdays74% on time · p90 65 min · 1,469 flights
  • Tuesdays74% on time · p90 65 min · 1,458 flights
  • Saturdays72% on time · p90 65 min · 1,459 flights
  • Thursdays71% on time · p90 70 min · 1,484 flights
  • Mondays70% on time · p90 85 min · 1,518 flights
  • Fridays67% on time · p90 75 min · 1,501 flights
  • Sundays66% on time · p90 90 min · 1,506 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.