OnTimeStats

Historical on-time performance

Salt Lake City to Butte

358 miData through Dec 2025Source: US DOT · BTS

Flights on SLC–BTM arrive on time 96% of the time over the last 12 months.

On-time rate96%arrived within 15 min
p90 delayon time1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 183 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlines
    On-time96%
    Medianon time
    p90on time
    Cancel0.0%
    Flights183

Why flights run late

Delay causes

  • Airline85%
  • Weather13%
  • Air traffic (NAS)3%
  • Late aircraft0%
  • Security0%

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 SLC → BTM

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 90% to 97% on time.

  • Overnights97% on time · p90 on time · 102 flights · limited
  • Middays94% on time · p90 5 min · 221 flights
  • Evenings92% on time · p90 10 min · 115 flights · limited
  • Afternoons90% on time · p90 10 min · 896 flights
  • Mornings90% on time · p90 10 min · 376 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 87% to 94% on time.

  • Wednesdays94% on time · p90 5 min · 260 flights
  • Sundays94% on time · p90 5 min · 259 flights
  • Saturdays93% on time · p90 5 min · 243 flights
  • Fridays92% on time · p90 10 min · 260 flights
  • Tuesdays90% on time · p90 10 min · 171 flights · limited
  • Thursdays88% on time · p90 15 min · 257 flights
  • Mondays87% on time · p90 15 min · 260 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.