IAH to DAL flight delays
Houston, TX (IAH) Dallas, TX (DAL) · 216 miles
93 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
75.82%
Arrived on time
Within 15 minutes of schedule
2.15%
Cancelled
Share of scheduled flights
73 min
When late, late by
Average across delayed arrivals
18 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The two directions do not behave alike. DAL to IAH arrives on time 5 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 Houston to Dallas run late more often than the average route, though not severely.
Every airline on IAH to DAL
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 |
|---|---|---|---|---|---|
| Southwest Airlines | 93 | 75.82% | 2.15% | 73 min | — |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
DAL to IAH Dallas back to Houston 70.79% on time —Other routes from Houston
Common questions
Are flights from Houston to Dallas usually delayed?
75.82% of flights on the IAH to DAL route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
How often are IAH to DAL flights cancelled?
2.15% of scheduled flights did not operate — about 22 in every thousand. That is in the normal range.
When IAH to DAL flights are late, how late are they?
About 73 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 IAH to DAL during July 2024 – July 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 →