OnTimeStats

Historical on-time performance

Pittsburgh to Salt Lake City

1,659 miData through Dec 2025Source: US DOT · BTS

Flights on PIT–SLC arrive on time 75% of the time over the last 12 months.

On-time rate75%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights

based on 335 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Delta Air Lines
    On-time75%
    Medianon time
    p9035 min
    Cancel0.6%
    Flights335

Why flights run late

Delay causes

  • Airline28%
  • Weather9%
  • Air traffic (NAS)21%
  • Late aircraft42%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly PIT → SLC

All airlines · rolling 36 months (2023-01 .. 2025-12).

Best day of week

On-time rates are fairly even by day on this route — ranging from 64% to 83% on time.

  • Tuesdays83% on time · p90 30 min · 58 flights · limited
  • Thursdays75% on time · p90 35 min · 56 flights · limited
  • Wednesdays74% on time · p90 35 min · 58 flights · limited
  • Mondays72% on time · p90 80 min · 58 flights · limited
  • Sundays68% on time · p90 75 min · 59 flights · limited
  • Fridays67% on time · p90 50 min · 57 flights · limited
  • Saturdays64% on time · p90 90 min · 58 flights · limited
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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.