OnTimeStats

Historical on-time performance

Salt Lake City to Milwaukee

1,247 miData through Dec 2025Source: US DOT · BTS

Flights on SLC–MKE arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 215 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-time78%
    Medianon time
    p9060 min
    Cancel0.0%
    Flights215

Why flights run late

Delay causes

  • Airline64%
  • Weather4%
  • Air traffic (NAS)10%
  • Late aircraft22%
  • 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 → MKE

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 81% on time.

  • Overnights81% on time · p90 30 min · 156 flights · limited
  • Evenings78% on time · p90 60 min · 755 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 77% to 81% on time.

  • Saturdays81% on time · p90 35 min · 132 flights · limited
  • Fridays79% on time · p90 60 min · 132 flights · limited
  • Thursdays79% on time · p90 40 min · 127 flights · limited
  • Wednesdays79% on time · p90 40 min · 131 flights · limited
  • Mondays79% on time · p90 85 min · 131 flights · limited
  • Tuesdays78% on time · p90 35 min · 131 flights · limited
  • Sundays77% on time · p90 60 min · 130 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.