OnTimeStats

Historical on-time performance

Salt Lake City to Idaho Falls

188 miData through Dec 2025Source: US DOT · BTS

Flights on SLC–IDA arrive on time 87% of the time over the last 12 months.

On-time rate87%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights

based on 1,081 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • SkyWest Airlinesbest
    On-time94%
    Medianon time
    p905 min
    Cancel0.2%
    Flights805
  • Delta Air Lines
    On-time68%
    Medianon time
    p9060 min
    Cancel0.4%
    Flights276

Why flights run late

Delay causes

  • Airline67%
  • Weather12%
  • Air traffic (NAS)7%
  • Late aircraft14%
  • 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 → IDA

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 86% to 96% on time.

  • Mornings96% on time · p90 5 min · 92 flights · limited
  • Middays91% on time · p90 10 min · 1,096 flights
  • Evenings90% on time · p90 10 min · 896 flights
  • Overnights86% on time · p90 20 min · 1,059 flights
  • Afternoons86% on time · p90 25 min · 106 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 88% to 91% on time.

  • Tuesdays91% on time · p90 5 min · 475 flights
  • Saturdays91% on time · p90 10 min · 409 flights
  • Fridays90% on time · p90 10 min · 476 flights
  • Wednesdays89% on time · p90 15 min · 475 flights
  • Sundays89% on time · p90 15 min · 465 flights
  • Mondays88% on time · p90 20 min · 477 flights
  • Thursdays88% on time · p90 15 min · 472 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.