RDU to IAH flight delays
Raleigh/Durham, NC (RDU) Houston, TX (IAH) · 1,042 miles
66 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
83.33%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
52 min
When late, late by
Average across delayed arrivals
10 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. IAH to RDU arrives on time 12.1 points less often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
Flights from Raleigh/Durham to Houston keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Every airline on RDU to IAH
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 35 | 85.71% | 0% | 66 min | — |
| Frontier Airlines | 30 | 80% | 0% | 41 min | — |
| SkyWest Airlines | 1 | 100% | 0% | — | — |
The return leg
IAH to RDU Houston back to Raleigh/Durham 71.21% on time —Other routes from Raleigh/Durham
Common questions
Are flights from Raleigh/Durham to Houston usually delayed?
83.33% of flights on the RDU to IAH route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
How often are RDU to IAH flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When RDU to IAH flights are late, how late are they?
About 52 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on RDU to IAH during March 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →