OnTimeStats

Historical on-time performance

Chicago to Reno

1,671 miData through Dec 2025Source: US DOT · BTS

Flights on ORD–RNO arrive on time 63% of the time over the last 12 months.

On-time rate63%arrived within 15 min
p90 delay85 min1 in 10 flights is worse (tail risk)
Cancelled1.0%of scheduled flights

based on 307 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time63%
    Medianon time
    p9085 min
    Cancel1.0%
    Flights307

Why flights run late

Delay causes

  • Airline34%
  • Weather2%
  • Air traffic (NAS)10%
  • 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 → RNO

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 53% to 67% on time.

  • Afternoons67% on time · p90 55 min · 153 flights · limited
  • Evenings61% on time · p90 85 min · 510 flights
  • Overnights53% on time · p90 65 min · 226 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 52% to 69% on time.

  • Tuesdays69% on time · p90 50 min · 123 flights · limited
  • Fridays63% on time · p90 85 min · 140 flights · limited
  • Saturdays62% on time · p90 70 min · 141 flights · limited
  • Wednesdays60% on time · p90 70 min · 123 flights · limited
  • Sundays60% on time · p90 70 min · 125 flights · limited
  • Mondays56% on time · p90 75 min · 126 flights · limited
  • Thursdays52% on time · p90 90 min · 125 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.