OnTimeStats

Historical on-time performance

Bozeman to San Francisco

807 miData through May 2026Source: US DOT · BTS

Flights on BZN–SFO arrive on time 77% of the time over the last 12 months.

On-time rate77%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 214 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlines
    On-time77%
    Medianon time
    p9045 min
    Cancel0.0%
    Flights214

Why flights run late

Delay causes

  • Airline9%
  • Weather1%
  • Air traffic (NAS)34%
  • Late aircraft55%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline53%
  • Weather41%
  • Air traffic (NAS)6%
  • Security0%

Most cancellations here are attributed to Airline. Shares are among 17 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 BZN → SFO

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

Best time of day

Middays are the most reliable time of day to fly this route — 89% on time.

  • Middays89% on time · p90 15 min · 204 flights
  • Afternoons75% on time · p90 60 min · 992 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 74% to 83% on time.

  • Tuesdays83% on time · p90 35 min · 163 flights · limited
  • Wednesdays80% on time · p90 75 min · 169 flights · limited
  • Saturdays80% on time · p90 50 min · 184 flights · limited
  • Thursdays77% on time · p90 75 min · 176 flights · limited
  • Mondays75% on time · p90 60 min · 176 flights · limited
  • Fridays75% on time · p90 70 min · 176 flights · limited
  • Sundays74% on time · p90 50 min · 193 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.