OnTimeStats

Historical on-time performance

Chicago to Fresno

1,730 miData through May 2026Source: 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 delay115 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%
    Median10 min
    p90115 min
    Cancel1.3%
    Flights152

Why flights run late

Delay causes

  • Airline36%
  • Weather1%
  • Air traffic (NAS)9%
  • Late aircraft54%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline50%
  • Weather50%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 2 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 ORD → FAT

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 50% to 57% on time.

  • Overnights57% on time · p90 70 min · 268 flights
  • Evenings50% on time · p90 115 min · 221 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.