OnTimeStats

Historical on-time performance

ILMORD

Wilmington to Chicago

760 miData through Dec 2025Source: US DOT · BTS

Flights on ILM–ORD arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
Median delayon timetypical arrival
p90 delay60 min1 in 10 flights is worsetail risk
Cancelled2.5%of scheduled flights

based on 199 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Envoy Airbest
    On-time84%
    Medianon time
    p9025 min
    Cancel1.9%
    Flights104
  • American Airlines
    On-time63%
    Medianon time
    p9095 min
    Cancel3.1%
    Flights64
  • SkyWest Airlines
    On-time48%
    Median10 min
    p9080 min
    Cancel3.2%
    Flights31

Why flights run late

Delay causes

  • Airline21%
  • Weather16%
  • Air traffic (NAS)21%
  • Late aircraft42%
  • 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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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.