OnTimeStats

Historical on-time performance

Kansas City to San Francisco

1,499 miData through May 2026Source: US DOT · BTS

Flights on MCI–SFO arrive on time 82% of the time over the last 12 months.

On-time rate82%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights

based on 244 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-time82%
    Medianon time
    p9020 min
    Cancel1.3%
    Flights153
  • United Airlines
    On-time81%
    Medianon time
    p9050 min
    Cancel0.0%
    Flights91

Why flights run late

Delay causes

  • Airline32%
  • Weather1%
  • Air traffic (NAS)40%
  • Late aircraft26%
  • Security0%

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

When flights don't go

Why flights were cancelled

  • Airline0%
  • Weather50%
  • Air traffic (NAS)50%
  • Security0%

Most cancellations here are attributed to Weather. 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 MCI → 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 · 673 flights
  • Evenings80% on time · p90 40 min · 251 flights
  • Afternoons80% on time · p90 25 min · 256 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 78% to 91% on time.

  • Fridays91% on time · p90 10 min · 170 flights · limited
  • Thursdays88% on time · p90 15 min · 168 flights · limited
  • Saturdays86% on time · p90 15 min · 170 flights · limited
  • Tuesdays86% on time · p90 20 min · 166 flights · limited
  • Wednesdays80% on time · p90 20 min · 167 flights · limited
  • Sundays79% on time · p90 40 min · 170 flights · limited
  • Mondays78% on time · p90 30 min · 169 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.