OnTimeStats

Historical on-time performance

Chicago to Des Moines

299 miData through Dec 2025Source: US DOT · BTS

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

On-time rate71%arrived within 15 min
Median delayon timetypical arrival
p90 delay65 min1 in 10 flights is worsetail risk
Cancelled2.7%of scheduled flights

based on 2,810 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Republic Airwaysbest
    On-time77%
    Medianon time
    p9045 min
    Cancel3.4%
    Flights650
  • United Airlines
    On-time74%
    Medianon time
    p9050 min
    Cancel1.5%
    Flights942
  • SkyWest Airlines
    On-time66%
    Medianon time
    p9080 min
    Cancel3.3%
    Flights841
  • Envoy Air
    On-time75%
    Medianon time
    p9035 min
    Cancel2.7%
    Flights224
  • American Airlines
    On-time56%
    Median5 min
    p90125 min
    Cancel3.3%
    Flights153

Why flights run late

Delay causes

  • Airline33%
  • Weather13%
  • Air traffic (NAS)13%
  • Late aircraft40%
  • 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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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.