OnTimeStats

Historical on-time performance

San Diego to Santa Rosa

508 miData through Dec 2025Source: US DOT · BTS

Flights on SAN–STS arrive on time 71% of the time over the last 12 months.

On-time rate71%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled3.8%of scheduled flights

based on 771 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
    p9040 min
    Cancel3.8%
    Flights771

Why flights run late

Delay causes

  • Airline22%
  • Weather15%
  • Air traffic (NAS)28%
  • Late aircraft35%
  • 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 SAN → STS

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 69% to 79% on time.

  • Mornings79% on time · p90 30 min · 891 flights
  • Afternoons78% on time · p90 25 min · 292 flights
  • Middays72% on time · p90 50 min · 159 flights · limited
  • Evenings70% on time · p90 45 min · 117 flights · limited
  • Overnights69% on time · p90 45 min · 594 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 63% to 81% on time.

  • Saturdays81% on time · p90 25 min · 264 flights
  • Tuesdays81% on time · p90 20 min · 253 flights
  • Wednesdays80% on time · p90 30 min · 265 flights
  • Thursdays77% on time · p90 30 min · 314 flights
  • Mondays73% on time · p90 35 min · 320 flights
  • Sundays71% on time · p90 40 min · 317 flights
  • Fridays63% on time · p90 55 min · 320 flights
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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.