OnTimeStats

Historical on-time performance

Chicago to Colorado Springs

917 miData through Dec 2025Source: US DOT · BTS

Flights on MDW–COS arrive on time 79% of the time over the last 12 months.

On-time rate79%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights

based on 196 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time79%
    Medianon time
    p9025 min
    Cancel0.0%
    Flights196

Why flights run late

Delay causes

  • Airline31%
  • Weather0%
  • Air traffic (NAS)20%
  • Late aircraft49%
  • 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 MDW → COS

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 53% to 86% on time.

  • Middays86% on time · p90 20 min · 411 flights
  • Afternoons83% on time · p90 20 min · 152 flights · limited
  • Mornings81% on time · p90 20 min · 477 flights
  • Evenings53% on time · p90 80 min · 137 flights · limited

Best day of week

On-time rates are fairly even by day on this route — ranging from 76% to 83% on time.

  • Thursdays83% on time · p90 20 min · 178 flights · limited
  • Mondays81% on time · p90 25 min · 181 flights · limited
  • Tuesdays79% on time · p90 25 min · 178 flights · limited
  • Wednesdays78% on time · p90 35 min · 176 flights · limited
  • Sundays78% on time · p90 35 min · 162 flights · limited
  • Saturdays78% on time · p90 30 min · 134 flights · limited
  • Fridays76% on time · p90 30 min · 183 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.