OnTimeStats

Historical on-time performance

Chicago to Fresno

1,730 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–FAT arrive on time 49% of the time over the last 12 months.

On-time rate49%arrived within 15 min
p90 delay125 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights

based on 152 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time49%
    Median15 min
    p90125 min
    Cancel1.3%
    Flights152

Why flights run late

Delay causes

  • Airline31%
  • Weather7%
  • Air traffic (NAS)6%
  • Late aircraft55%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly ORD → FAT

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 50% to 57% on time.

  • Overnights57% on time · p90 70 min · 252 flights
  • Evenings50% on time · p90 115 min · 202 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 48% to 63% on time.

  • Mondays63% on time · p90 65 min · 70 flights · limited
  • Saturdays60% on time · p90 70 min · 63 flights · limited
  • Tuesdays57% on time · p90 75 min · 56 flights · limited
  • Fridays53% on time · p90 95 min · 73 flights · limited
  • Sundays53% on time · p90 105 min · 68 flights · limited
  • Wednesdays48% on time · p90 75 min · 58 flights · limited
  • Thursdays48% on time · p90 110 min · 71 flights · limited
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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.