Historical on-time performance
Raleigh-durham to Denver
1,436 miData through Dec 2025Source: US DOT · BTS
Flights on RDU–DEN arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.3%of scheduled flights
based on 1,522 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time82%Medianon timep9035 minCancel0.5%Flights817
- Southwest AirlinesOn-time73%Medianon timep9050 minCancel0.1%Flights705
Why flights run late
Delay causes
- Airline21%
- Weather2%
- Air traffic (NAS)41%
- Late aircraft36%
- 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 RDU → 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 62% to 88% on time.
- Mornings88% on time · p90 15 min · 2,410 flights
- Middays86% on time · p90 20 min · 628 flights
- Afternoons74% on time · p90 45 min · 1,360 flights
- Overnights72% on time · p90 60 min · 336 flights
- Evenings62% on time · p90 75 min · 1,031 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 77% to 82% on time.
- Sundays82% on time · p90 30 min · 841 flights
- Wednesdays81% on time · p90 35 min · 796 flights
- Tuesdays79% on time · p90 35 min · 809 flights
- Saturdays79% on time · p90 35 min · 768 flights
- Mondays78% on time · p90 40 min · 853 flights
- Thursdays77% on time · p90 40 min · 849 flights
- Fridays77% on time · p90 50 min · 849 flights
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