OnTimeStats

Historical on-time performance

Eugene to San Francisco

451 miData through May 2026Source: US DOT · BTS

Flights on EUG–SFO arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights

based on 900 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.

  • United Airlines
    On-time78%
    Medianon time
    p9050 min
    Cancel0.4%
    Flights744
  • SkyWest Airlines
    On-time73%
    Medianon time
    p9050 min
    Cancel0.6%
    Flights156

Why flights run late

Delay causes

  • Airline25%
  • Weather1%
  • Air traffic (NAS)50%
  • Late aircraft25%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

When flights don't go

Why flights were cancelled

  • Airline75%
  • Weather0%
  • Air traffic (NAS)25%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 4 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 EUG → SFO

All airlines · rolling 36 months (2023-06 .. 2026-05).

Best time of day

Mornings are the most reliable time of day to fly this route — 87% on time.

  • Mornings87% on time · p90 15 min · 1,095 flights
  • Evenings73% on time · p90 75 min · 558 flights
  • Afternoons71% on time · p90 65 min · 730 flights
  • Middays68% on time · p90 65 min · 435 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 82% on time.

  • Tuesdays82% on time · p90 35 min · 387 flights
  • Saturdays81% on time · p90 45 min · 399 flights
  • Mondays78% on time · p90 55 min · 405 flights
  • Wednesdays77% on time · p90 50 min · 405 flights
  • Thursdays76% on time · p90 70 min · 405 flights
  • Fridays75% on time · p90 65 min · 408 flights
  • Sundays73% on time · p90 50 min · 410 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.