Best Time to Fly LGA to IAH: On-Time Stats by Hour & Airline
LaGuardia → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
4,031 flights were scheduled from New York (LGA) to Houston (IAH) in the last 12 months, and 76.7% of those that flew arrived on time, 0.9 points below the US average of 77.6%.
Among 4 airlines, SkyWest Airlines led with 80.7% on time and Delta Air Lines was last with 75.0%.
Over 24 months, Saturday was the most reliable day (83% on time) and June the worst month (69%).
The cancellation rate was 2.8% (US average 1.8%).
LGA 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 |
|---|---|---|---|---|
| SkyWest Airlines | 80.7% | 38 min | 3.1% | 32 |
| Spirit Airlines | 77.9% | 65 min | 4.0% | 273 |
| United Airlines | 77.4% | 81 min | 1.8% | 2,381 |
| Delta Air Lines | 75.0% | 86 min | 4.3% | 1,345 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly LGA to IAH
On-time arrival % by scheduled departure hour (local time), 8,337 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.7% | 5.0% | 99 |
| 6am–7am | 91.6% | 2.5% | 1,180 |
| 7am–8am | 91.2% | 2.1% | 676 |
| 8am–9am | 88.5% | 2.3% | 260 |
| 9am–10am | 89.0% | 1.6% | 796 |
| 10am–11am | 77.7% | 3.1% | 706 |
| 11am–12pm | 69.6% | 4.3% | 141 |
| 12pm–1pm | 86.0% | 1.7% | 658 |
| 1pm–2pm | 73.3% | 2.0% | 591 |
| 2pm–3pm | 75.3% | 1.0% | 690 |
| 3pm–4pm | 63.6% | 1.1% | 743 |
| 4pm–5pm | Limited data | 18 | |
| 5pm–6pm | 65.2% | 1.4% | 626 |
| 6pm–7pm | 64.7% | 3.7% | 513 |
| 7pm–8pm | 65.4% | 2.3% | 216 |
| 8pm–9pm | 64.9% | 4.0% | 424 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on LGA 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) | 81.2% | +1.3 pts | 0.6% | 166 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.7% | -1.2 pts | 2.4% | 290 |
| Summer peak (Jun 15 - Aug 15) | 71.0% | -8.9 pts | 4.1% | 1,474 |
| All other days | 79.9% | — | 1.8% | 6,407 |
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).