Historical on-time performance
Denver to Raleigh-durham
1,437 miData through May 2026Source: US DOT · BTS
Flights on DEN–RDU arrive on time 73% of the time over the last 12 months.
On-time rate73%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 1,545 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Frontier AirlinesOn-time94%Medianon timep90on timeCancel3.2%Flights31
- United AirlinesbestOn-time80%Medianon timep9035 minCancel0.5%Flights805
- Southwest AirlinesOn-time64%Median5 minp9055 minCancel0.7%Flights709
Why flights run late
Delay causes
- Airline27%
- Weather2%
- Air traffic (NAS)20%
- Late aircraft52%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline20%
- Weather80%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 10 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 DEN → RDU
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 — 82% on time.
- Mornings82% on time · p90 25 min · 1,520 flights
- Middays77% on time · p90 30 min · 1,362 flights
- Overnights74% on time · p90 70 min · 308 flights
- Afternoons71% on time · p90 50 min · 445 flights
- Evenings63% on time · p90 70 min · 2,067 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 76% on time.
- Saturdays76% on time · p90 40 min · 772 flights
- Wednesdays74% on time · p90 40 min · 785 flights
- Tuesdays74% on time · p90 45 min · 796 flights
- Sundays73% on time · p90 50 min · 841 flights
- Thursdays72% on time · p90 50 min · 860 flights
- Mondays70% on time · p90 45 min · 853 flights
- Fridays69% on time · p90 65 min · 856 flights
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