OnTimeStats

Historical on-time performance

Dallas to Salt Lake City

999 miData through Dec 2025Source: US DOT · BTS

Flights on DAL–SLC arrive on time 76% of the time over the last 12 months.

On-time rate76%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights

based on 668 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time76%
    Medianon time
    p9040 min
    Cancel0.9%
    Flights668

Why flights run late

Delay causes

  • Airline40%
  • Weather6%
  • Air traffic (NAS)9%
  • Late aircraft45%
  • 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 DAL → SLC

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

Best time of day

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

  • Mornings89% on time · p90 15 min · 697 flights
  • Middays84% on time · p90 20 min · 377 flights
  • Afternoons72% on time · p90 30 min · 68 flights · limited
  • Evenings67% on time · p90 60 min · 487 flights
  • Overnights59% on time · p90 60 min · 423 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 73% to 80% on time.

  • Wednesdays80% on time · p90 30 min · 288 flights
  • Tuesdays79% on time · p90 35 min · 291 flights
  • Mondays77% on time · p90 35 min · 298 flights
  • Saturdays75% on time · p90 35 min · 272 flights
  • Fridays74% on time · p90 35 min · 298 flights
  • Thursdays74% on time · p90 55 min · 292 flights
  • Sundays73% on time · p90 45 min · 313 flights
Advertisement

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.