OnTimeStats

Historical on-time performance

Denver to Windsor Locks

1,671 miData through Dec 2025Source: US DOT · BTS

Flights on DEN–BDL arrive on time 70% of the time over the last 12 months.

On-time rate70%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.5%of scheduled flights

based on 973 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

  • United Airlinesbest
    On-time77%
    Medianon time
    p9045 min
    Cancel0.1%
    Flights728
  • Southwest Airlines
    On-time47%
    Median15 min
    p90100 min
    Cancel1.6%
    Flights245

Why flights run late

Delay causes

  • Airline32%
  • Weather1%
  • Air traffic (NAS)14%
  • Late aircraft54%
  • 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 DEN → 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 61% to 85% on time.

  • Mornings85% on time · p90 25 min · 174 flights · limited
  • Middays84% on time · p90 20 min · 577 flights
  • Afternoons71% on time · p90 50 min · 180 flights · limited
  • Evenings61% on time · p90 80 min · 1,550 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 65% to 73% on time.

  • Tuesdays73% on time · p90 55 min · 343 flights
  • Wednesdays73% on time · p90 45 min · 340 flights
  • Saturdays73% on time · p90 45 min · 397 flights
  • Fridays67% on time · p90 70 min · 350 flights
  • Sundays67% on time · p90 60 min · 357 flights
  • Thursdays66% on time · p90 85 min · 345 flights
  • Mondays65% on time · p90 60 min · 350 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.