OnTimeStats

Historical on-time performance

Chicago to Columbia

315 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–COU arrive on time 68% of the time over the last 12 months.

On-time rate68%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled3.2%of scheduled flights

based on 1,227 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Envoy Airbest
    On-time70%
    Medianon time
    p9055 min
    Cancel2.9%
    Flights1,014
  • SkyWest Airlines
    On-time57%
    Medianon time
    p90110 min
    Cancel4.7%
    Flights213

Why flights run late

Delay causes

  • Airline18%
  • Weather13%
  • Air traffic (NAS)20%
  • Late aircraft49%
  • 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 → COU

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 60% to 84% on time.

  • Mornings84% on time · p90 25 min · 199 flights · limited
  • Middays80% on time · p90 45 min · 428 flights
  • Afternoons72% on time · p90 45 min · 379 flights
  • Evenings68% on time · p90 60 min · 844 flights
  • Overnights60% on time · p90 80 min · 406 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 66% to 77% on time.

  • Tuesdays77% on time · p90 50 min · 308 flights
  • Saturdays75% on time · p90 35 min · 305 flights
  • Mondays74% on time · p90 55 min · 337 flights
  • Fridays71% on time · p90 55 min · 329 flights
  • Wednesdays68% on time · p90 65 min · 317 flights
  • Sundays67% on time · p90 70 min · 335 flights
  • Thursdays66% on time · p90 70 min · 325 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.