Historical on-time performance
Dallas to Denver
651 miData through Dec 2025Source: US DOT · BTS
Flights on DAL–DEN arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.6%of scheduled flights
based on 3,042 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time69%Medianon timep9060 minCancel1.6%Flights3,042
Why flights run late
Delay causes
- Airline25%
- Weather7%
- Air traffic (NAS)29%
- Late aircraft39%
- 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 DAL → DEN
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 87% on time.
- Mornings87% on time · p90 15 min · 2,869 flights
- Middays77% on time · p90 35 min · 2,297 flights
- Afternoons66% on time · p90 60 min · 1,579 flights
- Evenings61% on time · p90 75 min · 1,845 flights
- Overnights60% on time · p90 75 min · 1,177 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 77% on time.
- Tuesdays77% on time · p90 40 min · 1,405 flights
- Saturdays76% on time · p90 40 min · 1,101 flights
- Mondays75% on time · p90 45 min · 1,479 flights
- Wednesdays72% on time · p90 45 min · 1,404 flights
- Sundays71% on time · p90 50 min · 1,462 flights
- Fridays71% on time · p90 45 min · 1,467 flights
- Thursdays68% on time · p90 60 min · 1,449 flights
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