OnTimeStats

Historical on-time performance

San Luis Obispo to Seattle

847 miData through May 2026Source: US DOT · BTS

Flights on SBP–SEA arrive on time 69% of the time over the last 12 months.

On-time rate69%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 184 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Alaska Airlines
    On-time69%
    Medianon time
    p9065 min
    Cancel1.1%
    Flights184

Why flights run late

Delay causes

  • Airline14%
  • Weather0%
  • Air traffic (NAS)30%
  • Late aircraft56%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline50%
  • Weather50%
  • Air traffic (NAS)0%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 2 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 SBP → 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 72% to 89% on time.

  • Mornings89% on time · p90 10 min · 121 flights · limited
  • Middays82% on time · p90 30 min · 145 flights · limited
  • Afternoons81% on time · p90 20 min · 341 flights
  • Evenings72% on time · p90 50 min · 409 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 87% on time.

  • Tuesdays87% on time · p90 20 min · 146 flights · limited
  • Thursdays80% on time · p90 45 min · 145 flights · limited
  • Fridays79% on time · p90 30 min · 149 flights · limited
  • Wednesdays78% on time · p90 25 min · 142 flights · limited
  • Saturdays77% on time · p90 45 min · 149 flights · limited
  • Mondays75% on time · p90 45 min · 146 flights · limited
  • Sundays74% on time · p90 40 min · 139 flights · limited

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.