OnTimeStats

Historical on-time performance

CHSORD

Charleston to Chicago

760 miData through Dec 2025Source: US DOT · BTS

Flights on CHS–ORD arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
Median delayon timetypical arrival
p90 delay40 min1 in 10 flights is worsetail risk
Cancelled2.0%of scheduled flights

based on 1,611 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time85%
    Medianon time
    p9020 min
    Cancel1.3%
    Flights598
  • Republic Airways
    On-time71%
    Medianon time
    p9040 min
    Cancel2.8%
    Flights461
  • Envoy Air
    On-time72%
    Medianon time
    p9055 min
    Cancel2.0%
    Flights552

Why flights run late

Delay causes

  • Airline21%
  • Weather2%
  • Air traffic (NAS)46%
  • Late aircraft31%
  • Security0%

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

Over time

On-time trend

By season

On-time rate by month

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Keep exploring

Related pages

Delay predictorfor this route→CHS airportCharleston→ORD airportChicago→United Airlines on this routecarrier detail→United Airlinesairline 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.