Best Time to Fly FLL to IAH: On-Time Stats by Hour & Airline
Fort Lauderdale-Hollywood International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
2,816 flights were scheduled from Fort Lauderdale (FLL) to Houston (IAH) in the last 12 months, and 81.2% of those that flew arrived on time, 3.5 points above the US average of 77.6%.
Among 4 airlines, United Airlines led with 88.0% on time and Frontier Airlines was last with 49.2%.
Over 24 months, Tuesday was the most reliable day (87% on time) and August the worst month (72%).
The cancellation rate was 1.2% (US average 1.8%).
FLL 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 | 88.0% | 80 min | 0.7% | 1,830 |
| Spirit Airlines | 71.6% | 74 min | 1.9% | 783 |
| JetBlue | 66.2% | 66 min | 4.3% | 69 |
| Frontier Airlines | 49.2% | 77 min | 3.0% | 134 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly FLL to IAH
On-time arrival % by scheduled departure hour (local time), 5,425 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 94.5% | 0.7% | 905 |
| 7am–8am | 90.7% | 0.8% | 260 |
| 8am–9am | 92.2% | 0.9% | 334 |
| 9am–10am | 86.2% | 1.4% | 295 |
| 10am–11am | Limited data | 2 | |
| 11am–12pm | 92.2% | 0.3% | 337 |
| 12pm–1pm | 63.1% | 1.3% | 151 |
| 1pm–2pm | 81.3% | 0.7% | 706 |
| 2pm–3pm | 71.7% | 4.5% | 111 |
| 3pm–4pm | 69.0% | 0.4% | 227 |
| 4pm–5pm | 70.1% | 1.2% | 479 |
| 5pm–6pm | 74.5% | 0.5% | 386 |
| 6pm–7pm | 74.9% | 2.2% | 411 |
| 7pm–8pm | 69.3% | 1.3% | 155 |
| 8pm–9pm | 69.0% | 1.5% | 206 |
| 9pm–10pm | 72.5% | 2.5% | 157 |
| 10pm–11pm | 66.9% | 2.3% | 303 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on FLL 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) | 83.6% | +1.6 pts | 0.0% | 110 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.3% | -10.7 pts | 1.9% | 263 |
| Summer peak (Jun 15 - Aug 15) | 75.6% | -6.4 pts | 1.3% | 830 |
| All other days | 82.0% | — | 1.1% | 4,222 |
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).