Historical on-time performance
Washington to Denver
1,476 miData through Dec 2025Source: US DOT · BTS
Flights on DCA–DEN arrive on time 75% of the time over the last 12 months.
On-time rate75%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 1,362 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.
- Frontier AirlinesOn-time76%Medianon timep9050 minCancel0.9%Flights1,025
- United AirlinesOn-time72%Medianon timep9085 minCancel0.0%Flights337
Why flights run late
Delay causes
- Airline22%
- Weather11%
- Air traffic (NAS)31%
- Late aircraft36%
- 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 DCA → 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 66% to 86% on time.
- Middays86% on time · p90 20 min · 1,002 flights
- Mornings85% on time · p90 20 min · 1,096 flights
- Afternoons73% on time · p90 75 min · 1,148 flights
- Evenings66% on time · p90 85 min · 1,063 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 81% on time.
- Sundays81% on time · p90 40 min · 624 flights
- Tuesdays81% on time · p90 40 min · 597 flights
- Saturdays80% on time · p90 40 min · 623 flights
- Wednesdays77% on time · p90 55 min · 597 flights
- Mondays76% on time · p90 60 min · 625 flights
- Fridays75% on time · p90 65 min · 624 flights
- Thursdays73% on time · p90 50 min · 619 flights
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