OnTimeStats

Historical on-time performance

Denver to Windsor Locks

1,671 miData through May 2026Source: US DOT · BTS

Flights on DEN–BDL arrive on time 73% of the time over the last 12 months.

On-time rate73%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled1.1%of scheduled flights

based on 881 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).

By airline

How each carrier compares

Not enough comparable data to name a most-on-time carrier — low-data carriers aren't ranked.

  • United Airlines
    On-time80%
    Medianon time
    p9030 min
    Cancel0.8%
    Flights728
  • Southwest Airlines
    On-time42%
    Median20 min
    p90110 min
    Cancel2.6%
    Flights153

Why flights run late

Delay causes

  • Airline33%
  • Weather1%
  • Air traffic (NAS)16%
  • Late aircraft50%
  • Security0%

Most delay minutes here are attributed to Late aircraft.

When flights don't go

Why flights were cancelled

  • Airline30%
  • Weather60%
  • Air traffic (NAS)10%
  • Security0%

Most cancellations here are attributed to Weather. Shares are among 10 cancellations with a reported cause (BTS reports causes from June 2003).

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 (2023-06 .. 2026-05).

Best time of day

On-time rates are fairly even by time of day on this route — ranging from 63% to 85% on time.

  • Mornings85% on time · p90 25 min · 259 flights
  • Middays85% on time · p90 20 min · 621 flights
  • Afternoons73% on time · p90 40 min · 133 flights · limited
  • Evenings63% on time · p90 75 min · 1,565 flights

Best day of week

On-time rates are fairly even by day on this route — ranging from 67% to 76% on time.

  • Wednesdays76% on time · p90 35 min · 351 flights
  • Saturdays74% on time · p90 45 min · 399 flights
  • Tuesdays74% on time · p90 55 min · 354 flights
  • Sundays68% on time · p90 55 min · 376 flights
  • Thursdays68% on time · p90 80 min · 364 flights
  • Fridays68% on time · p90 65 min · 370 flights
  • Mondays67% on time · p90 60 min · 365 flights

Keep exploring

Related pages

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.