Best Time to Fly IAH to TPA: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Tampa International
Data through July 2026 · Last updated October 18, 2026
1,579 flights were scheduled from Houston (IAH) to Tampa (TPA) in the last 12 months, and 82.1% of those that flew arrived on time, 4.5 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 83.2% on time and Frontier Airlines was last with 75.2%.
Over 24 months, Tuesday was the most reliable day (86% on time) and June the worst month (68%).
The cancellation rate was 0.5% (US average 1.8%).
IAH to TPA 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 | 83.2% | 60 min | 0.4% | 1,349 |
| Spirit Airlines | 76.3% | 62 min | 0.0% | 114 |
| Frontier Airlines | 75.2% | 128 min | 2.6% | 116 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to TPA
On-time arrival % by scheduled departure hour (local time), 3,435 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 2 | |
| 7am–8am | 91.4% | 0.9% | 765 |
| 8am–9am | Limited data | 1 | |
| 9am–10am | Limited data | 6 | |
| 10am–11am | Limited data | 25 | |
| 11am–12pm | 83.3% | 1.8% | 55 |
| 12pm–1pm | 77.9% | 1.0% | 689 |
| 1pm–2pm | 70.6% | 0.6% | 171 |
| 2pm–3pm | 83.4% | 1.3% | 619 |
| 3pm–4pm | 68.1% | 0.0% | 47 |
| 4pm–5pm | Limited data | 15 | |
| 5pm–6pm | 81.0% | 0.0% | 63 |
| 6pm–7pm | 76.6% | 1.7% | 773 |
| 7pm–8pm | 65.1% | 1.2% | 84 |
| 8pm–9pm | 62.8% | 3.8% | 53 |
| 9pm–10pm | 70.3% | 3.0% | 66 |
| 10pm–11pm | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on IAH to TPA
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) | 90.1% | +7.0 pts | 0.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.3% | -11.8 pts | 0.7% | 151 |
| Summer peak (Jun 15 - Aug 15) | 69.9% | -13.2 pts | 1.5% | 583 |
| All other days | 83.1% | — | 1.3% | 2,630 |
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).