OnTimeStats

Historical on-time performance

Chicago to Hailey

1,341 miData through Dec 2025Source: US DOT · BTS

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

On-time rate71%arrived within 15 min
p90 delay100 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 31 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time71%
    Medianon time
    p90100 min
    Cancel0.0%
    Flights31

Why flights run late

Delay causes

  • Airline58%
  • Weather0%
  • Air traffic (NAS)5%
  • Late aircraft37%
  • Security0%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly ORD → SUN

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

Best day of week

On-time rates are fairly even by day on this route — ranging from 58% to 76% on time.

  • Sundays76% on time · p90 80 min · 70 flights · limited
  • Saturdays75% on time · p90 45 min · 88 flights · limited
  • Fridays58% on time · p90 90 min · 57 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.