LAX to IAH flight delays
LAX IAH Los Angeles to George Bush · 1,379 miles
16,063 flights were scheduled from LAX to IAH over July 2023 through June 2026. Of the 15,832 that made the trip, 85.4% reached the gate less than 15 minutes behind schedule. These are arrival figures: “on time” means the flight reached the gate less than 15 minutes behind schedule. Arrivals are what decide whether you make the connection, so route and airline pages are scored on them rather than on pushback.
Data through June 2026 · Bureau of Transportation Statistics
The route in brief
- Flights in the window
- 16,063
- Arrived on time
- 85.4%
- Cancelled
- 1.1%
- Scheduled distance
- 1,379 miles
Cancellations are counted against everything scheduled. Diverted flights are counted with them rather than as very late arrivals, which is why the on-time share and the cancellation rate do not add up to everything that happened.
Airline by airline
Airlines with at least 100 flights on LAX–IAH, busiest first. Same route, same weather, same air traffic — which makes this the fairest comparison on the site.
| Airline | Arrived on time | Typical delay | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 87.9% | 61 min | 1% | 10,198 |
| Spirit Airlines | 79.9% | 84 min | 1.2% | 2,242 |
| Delta Air Lines | 83.9% | 84 min | 1.1% | 1,977 |
| SkyWest Airlines | 86.2% | 58 min | 0.5% | 1,118 |
| Frontier Airlines | 62% | 71 min | 2.1% | 528 |
Month by month
July was the month to avoid on LAX–IAH: 78.7% of flights arrived on time, against 91.5% in September. Each bar pools three years of that calendar month.
| Month | Share flights that arrived on time | Flights |
|---|---|---|
| January | 86.8% | 1,321 |
| February | 88.1% | 1,181 |
| March | 84.6% | 1,316 |
| April | 88.8% | 1,332 |
| May | 82.9% | 1,334 |
| June | 80.1% | 1,299 |
| July | 78.7% | 1,418 |
| August | 84.1% | 1,417 |
| September | 91.5% | 1,335 |
| October | 89.8% | 1,424 |
| November | 85.5% | 1,318 |
| December | 83.4% | 1,368 |
Both ends of the route
A route’s record is built out of two airports’ habits. The hour-by-hour grid for each is on its own page.
LAX to IAH in one number
LAX → IAH
When a flight on this route was late, it was late by about 69 min.
Questions about LAX to IAH
- Which airline is most reliable from LAX to IAH?
- United Airlines — its flights on this pairing arrived on time 87.9% of the time, with 10,198 scheduled. Frontier Airlines came in at 62% over 528 scheduled. Airlines with fewer than 100 flights on the route are not rated.
- What is the worst month to fly LAX to IAH?
- July, at 78.7% of arrivals on time, with 1,418 flights scheduled. September was the best of the year at 91.5%.
- How late are LAX–IAH flights when they are late?
- 69 min on average, counting only the flights that arrived 15 minutes or more behind schedule. The on-time flights are left out of that average on purpose — mixing them in would flatter it.
- How often is the LAX to IAH flight cancelled?
- 1.1% of scheduled flights on this route were cancelled, July 2023 through June 2026. Diverted flights are counted with the cancellations rather than as late arrivals.
- Are these departure or arrival numbers?
- Arrival. A flight counts as on time here if it reached the gate at IAH less than 15 minutes behind schedule. Airport pages score departures instead, because that is the number you can act on when you pick a booking time.