Best Time to Fly LAX to IAH: On-Time Stats by Hour & Airline
Los Angeles International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
5,216 flights were scheduled from Los Angeles (LAX) to Houston (IAH) in the last 12 months, and 84.8% of those that flew arrived on time, 7.2 points above the US average of 77.6%.
United Airlines was the most punctual of the 5 airlines on the route at 87.5%, while Frontier Airlines trailed at 69.9%.
September has been the best month (93% on time) and Sunday the weakest day of the week (84%).
0.5% of flights were cancelled, versus 1.8% nationally.
LAX to IAH on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 87.5% | 52 min | 0.2% | 3,438 |
| Delta Air Lines | 84.9% | 70 min | 1.1% | 646 |
| SkyWest Airlines | 83.0% | 72 min | 0.5% | 408 |
| Spirit Airlines | 75.9% | 75 min | 1.3% | 392 |
| Frontier Airlines | 69.9% | 75 min | 1.5% | 332 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LAX to IAH
On-time arrival % by scheduled departure hour (local time), 10,722 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 90.4% | 1.0% | 878 |
| 1am–2am | Limited data | 27 | |
| 5am–6am | 94.5% | 0.3% | 755 |
| 6am–7am | 95.2% | 1.3% | 299 |
| 7am–8am | 92.6% | 0.2% | 557 |
| 8am–9am | 90.7% | 0.4% | 1,282 |
| 9am–10am | 83.6% | 0.4% | 477 |
| 10am–11am | 88.7% | 0.1% | 856 |
| 11am–12pm | 84.7% | 0.3% | 656 |
| 12pm–1pm | 83.6% | 0.8% | 246 |
| 1pm–2pm | 74.8% | 0.7% | 1,127 |
| 2pm–3pm | 73.8% | 1.7% | 698 |
| 3pm–4pm | 82.4% | 0.5% | 434 |
| 4pm–5pm | 84.4% | 0.3% | 310 |
| 5pm–6pm | 89.3% | 0.9% | 424 |
| 6pm–7pm | 80.9% | 1.0% | 987 |
| 7pm–8pm | 83.2% | 0.2% | 417 |
| 8pm–9pm | Limited data | 1 | |
| 9pm–10pm | Limited data | 2 | |
| 11pm–12am | 84.9% | 1.4% | 289 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LAX to IAH
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 87.6% | +0.9 pts | 0.0% | 211 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.4% | -11.4 pts | 0.8% | 468 |
| Summer peak (Jun 15 - Aug 15) | 82.0% | -4.7 pts | 0.7% | 1,767 |
| All other days | 86.7% | — | 0.6% | 8,276 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).