OnTimeStats

Historical on-time performance

Chicago to Windsor Locks

777 miData through Dec 2025Source: US DOT · BTS

Flights on MDW–BDL arrive on time 78% of the time over the last 12 months.

On-time rate78%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights

based on 739 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • Southwest Airlines
    On-time78%
    Medianon time
    p9035 min
    Cancel0.3%
    Flights739

Why flights run late

Delay causes

  • Airline35%
  • Weather0%
  • Air traffic (NAS)12%
  • Late aircraft53%
  • 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 → BDL

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 54% to 88% on time.

  • Mornings88% on time · p90 15 min · 177 flights · limited
  • Middays82% on time · p90 25 min · 814 flights
  • Afternoons73% on time · p90 35 min · 268 flights
  • Evenings69% on time · p90 45 min · 659 flights
  • Overnights54% on time · p90 85 min · 306 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 65% to 80% on time.

  • Wednesdays80% on time · p90 30 min · 331 flights
  • Saturdays77% on time · p90 35 min · 203 flights
  • Tuesdays76% on time · p90 30 min · 332 flights
  • Thursdays74% on time · p90 40 min · 353 flights
  • Mondays73% on time · p90 40 min · 358 flights
  • Fridays72% on time · p90 45 min · 351 flights
  • Sundays65% on time · p90 50 min · 296 flights
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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.