OnTimeStats

Historical on-time performance

CHAORD

Chattanooga to Chicago

501 miData through Dec 2025Source: US DOT · BTS

Flights on CHA–ORD arrive on time 67% of the time over the last 12 months.

On-time rate67%arrived within 15 min
Median delayon timetypical arrival
p90 delay65 min1 in 10 flights is worsetail risk
Cancelled2.8%of scheduled flights

based on 528 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airways
    On-time65%
    Medianon time
    p9080 min
    Cancel2.7%
    Flights147
  • SkyWest Airlinesbest
    On-time67%
    Medianon time
    p9055 min
    Cancel2.9%
    Flights381

Why flights run late

Delay causes

  • Airline41%
  • Weather8%
  • Air traffic (NAS)17%
  • Late aircraft34%
  • 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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Keep exploring

Related pages

Delay predictorfor this route→CHA airportChattanooga→ORD airportChicago→Envoy Air on this routecarrier detail→Envoy Airairline profile→

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.