OnTimeStats

Historical on-time performance

DAYORD

Dayton to Chicago

240 miData through Dec 2025Source: US DOT · BTS

Flights on DAY–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 delay70 min1 in 10 flights is worsetail risk
Cancelled3.1%of scheduled flights

based on 1,508 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • PSA Airlines
    On-time69%
    Medianon time
    p9090 min
    Cancel3.8%
    Flights531
  • SkyWest Airlines
    On-time71%
    Medianon time
    p9065 min
    Cancel2.5%
    Flights734
  • Envoy Air
    On-time73%
    Medianon time
    p9050 min
    Cancel3.8%
    Flights182
  • United Airlinesbest
    On-time82%
    Medianon time
    p9030 min
    Cancel1.6%
    Flights61

Why flights run late

Delay causes

  • Airline28%
  • Weather6%
  • Air traffic (NAS)23%
  • Late aircraft43%
  • 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.