OnTimeStats

Historical on-time performance

Santa Rosa to Seattle

618 miData through May 2026Source: US DOT · BTS

Flights on STS–SEA arrive on time 70% of the time over the last 12 months.

On-time rate70%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights

based on 348 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • SkyWest Airlines
    On-time79%
    Median5 min
    p9060 min
    Cancel1.6%
    Flights61
  • Alaska Airlines
    On-time69%
    Medianon time
    p9050 min
    Cancel0.7%
    Flights287

Why flights run late

Delay causes

  • Airline19%
  • Weather0%
  • Air traffic (NAS)34%
  • Late aircraft46%
  • Security1%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline67%
  • Weather0%
  • Air traffic (NAS)33%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 3 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 STS → SEA

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 38% to 86% on time.

  • Middays86% on time · p90 20 min · 191 flights · limited
  • Mornings80% on time · p90 30 min · 290 flights
  • Afternoons76% on time · p90 35 min · 596 flights
  • Evenings70% on time · p90 60 min · 213 flights
  • Overnights38% on time · p90 80 min · 126 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 66% to 81% on time.

  • Saturdays81% on time · p90 40 min · 183 flights · limited
  • Wednesdays79% on time · p90 40 min · 186 flights · limited
  • Fridays76% on time · p90 40 min · 215 flights
  • Tuesdays75% on time · p90 30 min · 188 flights · limited
  • Thursdays72% on time · p90 45 min · 212 flights
  • Sundays69% on time · p90 50 min · 216 flights
  • Mondays66% on time · p90 60 min · 216 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.