Historical on-time performance
Windsor Locks to Denver
1,671 miData through Dec 2025Source: US DOT · BTS
Flights on BDL–DEN arrive on time 81% of the time over the last 12 months.
On-time rate81%arrived within 15 min
p90 delay30 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
Too close to call — no single carrier is clearly more on-time here.
- Southwest AirlinesOn-time80%Medianon timep9025 minCancel0.4%Flights245
- United AirlinesOn-time81%Medianon timep9030 minCancel0.5%Flights728
Why flights run late
Delay causes
- Airline35%
- Weather7%
- Air traffic (NAS)40%
- Late aircraft18%
- 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 BDL → DEN
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 87% on time.
- Mornings87% on time · p90 15 min · 1,413 flights
- Middays81% on time · p90 25 min · 193 flights · limited
- Afternoons72% on time · p90 50 min · 756 flights
- Evenings61% on time · p90 45 min · 109 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 83% on time.
- Mondays83% on time · p90 25 min · 351 flights
- Tuesdays82% on time · p90 25 min · 343 flights
- Wednesdays82% on time · p90 30 min · 340 flights
- Fridays82% on time · p90 30 min · 350 flights
- Sundays81% on time · p90 30 min · 357 flights
- Thursdays80% on time · p90 25 min · 345 flights
- Saturdays73% on time · p90 35 min · 397 flights
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