Historical on-time performance
Dallas to Denver
651 miData through May 2026Source: US DOT · BTS
Flights on DAL–DEN arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled1.3%of scheduled flights
based on 3,017 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time68%Medianon timep9060 minCancel1.3%Flights3,017
Why flights run late
Delay causes
- Airline26%
- Weather6%
- Air traffic (NAS)25%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline21%
- Weather59%
- Air traffic (NAS)21%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 39 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 DAL → DEN
All airlines · rolling 36 months (2023-06 .. 2026-05).
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 · 2,813 flights
- Middays76% on time · p90 35 min · 2,323 flights
- Afternoons65% on time · p90 60 min · 1,649 flights
- Overnights61% on time · p90 75 min · 1,125 flights
- Evenings59% on time · p90 80 min · 1,816 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 · 1,370 flights
- Mondays74% on time · p90 45 min · 1,462 flights
- Wednesdays74% on time · p90 40 min · 1,369 flights
- Saturdays74% on time · p90 45 min · 1,131 flights
- Fridays70% on time · p90 50 min · 1,471 flights
- Sundays70% on time · p90 55 min · 1,470 flights
- Thursdays68% on time · p90 55 min · 1,453 flights
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