OnTimeStats

Historical on-time performance

Chicago to Phoenix

1,440 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–PHX arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
Median delayon timetypical arrival
p90 delay45 min1 in 10 flights is worsetail risk
Cancelled1.0%of scheduled flights

based on 5,344 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • American Airlines
    On-time75%
    Medianon time
    p9045 min
    Cancel1.5%
    Flights2,969
  • United Airlinesbest
    On-time82%
    Medianon time
    p9030 min
    Cancel0.4%
    Flights1,978
  • Southwest Airlines
    On-time58%
    Median5 min
    p9060 min
    Cancel0.0%
    Flights318
  • Frontier Airlines
    On-time59%
    Medianon time
    p9075 min
    Cancel1.3%
    Flights79

Why flights run late

Delay causes

  • Airline36%
  • Weather4%
  • Air traffic (NAS)16%
  • Late aircraft44%
  • 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.