OnTimeStats

Historical on-time performance

Chicago to Bozeman

1,198 miData through Dec 2025Source: US DOT · BTS

Flights on MDW–BZN arrive on time 82% of the time over the last 12 months.

On-time rate82%arrived within 15 min
p90 delay20 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 92 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time82%
    Medianon time
    p9020 min
    Cancel0.0%
    Flights92

Why flights run late

Delay causes

  • Airline24%
  • Weather9%
  • Air traffic (NAS)61%
  • Late aircraft6%
  • Security0%

Most delay minutes here are attributed to Air traffic (NAS).

Over time

On-time trend

By season

On-time rate by month

When to fly

Best time to fly MDW → BZN

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 80% to 83% on time.

  • Mornings83% on time · p90 20 min · 128 flights · limited
  • Middays80% on time · p90 35 min · 112 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.