Historical on-time performance
Houston to Raleigh-durham
1,043 miData through Dec 2025Source: US DOT · BTS
Flights on IAH–RDU arrive on time 83% of the time over the last 12 months.
On-time rate83%arrived within 15 min
p90 delay35 min1 in 10 flights is worse (tail risk)
Cancelled0.7%of scheduled flights
based on 689 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time83%Medianon timep9035 minCancel0.7%Flights689
Why flights run late
Delay causes
- Airline34%
- Weather12%
- Air traffic (NAS)16%
- Late aircraft38%
- 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 IAH → RDU
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Middays are the most reliable time of day to fly this route — 85% on time.
- Middays85% on time · p90 30 min · 961 flights
- Mornings78% on time · p90 45 min · 229 flights
- Evenings71% on time · p90 55 min · 1,158 flights
- Afternoons69% on time · p90 70 min · 174 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 80% on time.
- Wednesdays80% on time · p90 45 min · 348 flights
- Tuesdays78% on time · p90 40 min · 353 flights
- Saturdays78% on time · p90 50 min · 289 flights
- Fridays77% on time · p90 45 min · 383 flights
- Mondays75% on time · p90 55 min · 393 flights
- Sundays75% on time · p90 50 min · 372 flights
- Thursdays74% on time · p90 50 min · 390 flights
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