IAH to LAX flight delays
Houston, TX (IAH) Los Angeles, CA (LAX) · 1,379 miles
397 flights · March 2025 – August 2026 · US Bureau of Transportation Statistics
79.24%
Arrived on time
Within 15 minutes of schedule
0.25%
Cancelled
Share of scheduled flights
58 min
When late, late by
Average across delayed arrivals
13 min
Delay per flight
Averaged over every flight flown
What the record says about this route
This route does better than its own airport. Departures from IAH overall run 8.3 points less punctual than this particular one — so whatever congestion IAH has, this route is largely escaping it.
Only United Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 397 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
The Houston to Los Angeles route sits close to the middle of the record — neither notably punctual nor notably late.
Which airline should you fly on this route?
Over March 2025 – August 2026, United Airlines arrived on time most often on IAH to LAX.
Every airline on IAH to LAX
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 | 284 | 79.86% | 0% | 58 min | B |
| Delta Air Lines | 53 | 81.13% | 0% | 73 min | — |
| Frontier Airlines | 30 | 76.67% | 0% | 52 min | — |
| SkyWest Airlines | 29 | 71.43% | 3.45% | 36 min | — |
| American Airlines | 1 | 100% | 0% | — | — |
The return leg
LAX to IAH Los Angeles back to Houston 83.59% on time BOther routes from Houston
Common questions
Are flights from Houston to Los Angeles usually delayed?
79.24% of flights on the IAH to LAX 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.
Which airlines fly from Houston to Los Angeles?
Only United Airlines appears in the published record on this route, with 284 flights and 79.86% arriving on time.
How often are IAH to LAX flights cancelled?
0.25% of scheduled flights did not operate — about 3 in every thousand. That is in the normal range.
When IAH to LAX flights are late, how late are they?
About 58 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 LAX 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 →