OnTimeStats

Historical on-time performance

CHSIAD

Charleston to Washington

441 miData through Dec 2025Source: US DOT · BTS

Flights on CHS–IAD arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min
Median delayon timetypical arrival
p90 delay25 min1 in 10 flights is worsetail risk
Cancelled2.0%of scheduled flights

based on 595 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time90%
    Medianon time
    p9010 min
    Cancel0.5%
    Flights213
  • Republic Airways
    On-time81%
    Medianon time
    p9040 min
    Cancel2.9%
    Flights382

Why flights run late

Delay causes

  • Airline20%
  • Weather5%
  • Air traffic (NAS)24%
  • Late aircraft51%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

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→IAD airportWashington→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.