OnTimeStats

Historical on-time performance

Lexington KY to Chicago

323 miData through May 2026Source: US DOT · BTS

Flights on LEX–ORD arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled2.8%of scheduled flights

based on 1,661 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Envoy Airbest
    On-time76%
    Medianon time
    p9045 min
    Cancel1.8%
    Flights225
  • SkyWest Airlines
    On-time68%
    Medianon time
    p9085 min
    Cancel3.0%
    Flights1,436

Why flights run late

Delay causes

  • Airline40%
  • Weather10%
  • Air traffic (NAS)22%
  • Late aircraft28%
  • Security0%

Most delay minutes here are attributed to Airline.

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather89%
  • Air traffic (NAS)11%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 47 cancellations with a reported cause (BTS reports causes from June 2003).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly LEX → ORD

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 61% to 83% on time.

  • Mornings83% on time · p90 25 min · 1,571 flights
  • Middays80% on time · p90 40 min · 1,171 flights
  • Afternoons75% on time · p90 60 min · 435 flights
  • Evenings61% on time · p90 90 min · 1,374 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 77% on time.

  • Mondays77% on time · p90 40 min · 671 flights
  • Wednesdays76% on time · p90 40 min · 648 flights
  • Tuesdays76% on time · p90 50 min · 649 flights
  • Thursdays75% on time · p90 60 min · 657 flights
  • Saturdays74% on time · p90 45 min · 578 flights
  • Fridays73% on time · p90 65 min · 668 flights
  • Sundays73% on time · p90 65 min · 684 flights

Keep exploring

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.