OnTimeStats

Historical on-time performance

San Francisco to Tucson

751 miData through Dec 2025Source: US DOT · BTS

Flights on SFO–TUS arrive on time 84% of the time over the last 12 months.

On-time rate84%arrived within 15 min
p90 delay30 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights

based on 966 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Too close to call — no single carrier is clearly more on-time here.

  • United Airlines
    On-time81%
    Medianon time
    p9040 min
    Cancel0.0%
    Flights81
  • SkyWest Airlines
    On-time84%
    Medianon time
    p9025 min
    Cancel0.3%
    Flights885

Why flights run late

Delay causes

  • Airline39%
  • Weather1%
  • Air traffic (NAS)30%
  • Late aircraft29%
  • Security1%

Most delay minutes here are attributed to Airline.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly SFO → TUS

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 78% to 85% on time.

  • Mornings85% on time · p90 25 min · 920 flights
  • Overnights85% on time · p90 30 min · 75 flights · limited
  • Evenings83% on time · p90 30 min · 832 flights
  • Middays80% on time · p90 45 min · 510 flights
  • Afternoons78% on time · p90 45 min · 451 flights

Best day of week

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

  • Saturdays86% on time · p90 25 min · 381 flights
  • Sundays85% on time · p90 25 min · 391 flights
  • Tuesdays85% on time · p90 25 min · 401 flights
  • Wednesdays82% on time · p90 40 min · 413 flights
  • Fridays81% on time · p90 40 min · 393 flights
  • Mondays80% on time · p90 45 min · 411 flights
  • Thursdays79% on time · p90 30 min · 398 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.