OnTimeStats

Historical on-time performance

San Francisco to Hailey

587 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–SUN arrive on time 85% of the time over the last 12 months.

On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights

based on 218 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time85%
    Medianon time
    p9020 min
    Cancel0.9%
    Flights218

Why flights run late

Delay causes

  • Airline49%
  • Weather15%
  • Air traffic (NAS)15%
  • Late aircraft21%
  • 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 SFO → SUN

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 76% to 86% on time.

  • Evenings86% on time · p90 25 min · 311 flights
  • Mornings84% on time · p90 15 min · 88 flights · limited
  • Middays76% on time · p90 45 min · 272 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 88% on time.

  • Saturdays88% on time · p90 15 min · 154 flights · limited
  • Wednesdays87% on time · p90 20 min · 75 flights · limited
  • Thursdays84% on time · p90 25 min · 119 flights · limited
  • Sundays80% on time · p90 45 min · 82 flights · limited
  • Tuesdays79% on time · p90 70 min · 75 flights · limited
  • Fridays76% on time · p90 40 min · 123 flights · limited
  • Mondays76% on time · p90 40 min · 80 flights · limited
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Keep exploring

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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.