OnTimeStats

Historical on-time performance

OKCORD

Oklahoma City to Chicago

693 miData through Dec 2025Source: US DOT · BTS

Flights on OKC–ORD arrive on time 74% of the time over the last 12 months.

On-time rate74%arrived within 15 min
Median delayon timetypical arrival
p90 delay65 min1 in 10 flights is worsetail risk
Cancelled1.7%of scheduled flights

based on 2,388 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airwaysbest
    On-time87%
    Medianon time
    p9015 min
    Cancel1.6%
    Flights249
  • SkyWest Airlines
    On-time72%
    Medianon time
    p9070 min
    Cancel1.7%
    Flights1,847
  • Envoy Air
    On-time80%
    Medianon time
    p9035 min
    Cancel1.7%
    Flights292

Why flights run late

Delay causes

  • Airline55%
  • Weather9%
  • Air traffic (NAS)21%
  • Late aircraft15%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

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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.