Historical on-time performance
Houston to Raleigh-durham
1,043 miData through May 2026Source: 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 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 719 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 timep9040 minCancel0.8%Flights719
Why flights run late
Delay causes
- Airline36%
- Weather8%
- Air traffic (NAS)13%
- Late aircraft43%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 6 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 IAH → RDU
All airlines · rolling 36 months (2023-06 .. 2026-05).
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 · 972 flights
- Mornings79% on time · p90 45 min · 288 flights
- Evenings72% on time · p90 55 min · 1,157 flights
- Afternoons69% on time · p90 75 min · 204 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 75% to 81% on time.
- Wednesdays81% on time · p90 40 min · 349 flights
- Tuesdays80% on time · p90 35 min · 358 flights
- Fridays78% on time · p90 45 min · 402 flights
- Saturdays77% on time · p90 55 min · 302 flights
- Thursdays76% on time · p90 50 min · 415 flights
- Sundays75% on time · p90 50 min · 394 flights
- Mondays75% on time · p90 55 min · 407 flights
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