OnTimeStats

Historical on-time performance

San Francisco to Kona

2,367 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–KOA arrive on time 85% of the time over the last 12 months.

On-time rate85%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 693 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time85%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights693

Why flights run late

Delay causes

  • Airline44%
  • Weather0%
  • Air traffic (NAS)10%
  • Late aircraft46%
  • 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 SFO → KOA

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 81% to 84% on time.

  • Evenings84% on time · p90 20 min · 290 flights
  • Mornings82% on time · p90 35 min · 1,226 flights
  • Afternoons81% on time · p90 25 min · 660 flights
  • Middays81% on time · p90 30 min · 157 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 79% to 86% on time.

  • Mondays86% on time · p90 20 min · 304 flights
  • Sundays84% on time · p90 20 min · 335 flights
  • Saturdays83% on time · p90 30 min · 430 flights
  • Tuesdays81% on time · p90 30 min · 329 flights
  • Thursdays80% on time · p90 25 min · 332 flights
  • Wednesdays79% on time · p90 30 min · 300 flights
  • Fridays79% on time · p90 45 min · 303 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.