OnTimeStats

Historical on-time performance

Portland to San Luis Obispo

722 miData through Dec 2025Source: US DOT · BTS

Flights on PDX–SBP arrive on time 87% of the time over the last 12 months.

On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 61 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time87%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights61

Why flights run late

Delay causes

  • Airline26%
  • Weather0%
  • Air traffic (NAS)30%
  • Late aircraft44%
  • 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 PDX → SBP

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 84% to 87% on time.

  • Afternoons87% on time · p90 15 min · 167 flights · limited
  • Middays86% on time · p90 20 min · 173 flights · limited
  • Mornings84% on time · p90 20 min · 167 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 83% to 90% on time.

  • Wednesdays90% on time · p90 15 min · 58 flights · limited
  • Sundays88% on time · p90 20 min · 88 flights · limited
  • Tuesdays87% on time · p90 15 min · 53 flights · limited
  • Saturdays86% on time · p90 20 min · 56 flights · limited
  • Mondays85% on time · p90 15 min · 85 flights · limited
  • Thursdays84% on time · p90 20 min · 80 flights · limited
  • Fridays83% on time · p90 20 min · 87 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.