Best Time to Fly TPA to IAH: On-Time Stats by Hour & Airline
Tampa International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
1,582 flights were scheduled from Tampa (TPA) to Houston (IAH) in the last 12 months, and 85.4% of those that flew arrived on time, 7.7 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 87.5% on time and Frontier Airlines was last with 72.8%.
Over 24 months, Tuesday was the most reliable day (87% on time) and June the worst month (74%).
The cancellation rate was 0.5% (US average 1.8%).
TPA 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% | 76 min | 0.3% | 1,348 |
| Spirit Airlines | 73.3% | 104 min | 1.7% | 118 |
| Frontier Airlines | 72.8% | 99 min | 1.7% | 116 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TPA to IAH
On-time arrival % by scheduled departure hour (local time), 3,440 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 8 | |
| 6am–7am | 87.8% | 0.9% | 108 |
| 7am–8am | 93.4% | 1.3% | 691 |
| 8am–9am | 89.8% | 0.0% | 49 |
| 9am–10am | 88.3% | 1.4% | 644 |
| 10am–11am | 63.0% | 5.3% | 57 |
| 11am–12pm | 88.7% | 1.0% | 683 |
| 12pm–1pm | 82.9% | 0.0% | 82 |
| 1pm–2pm | Limited data | 17 | |
| 2pm–3pm | 85.7% | 0.0% | 77 |
| 3pm–4pm | 73.3% | 4.3% | 47 |
| 4pm–5pm | 81.8% | 0.0% | 88 |
| 5pm–6pm | 72.6% | 1.3% | 752 |
| 6pm–7pm | 53.1% | 5.8% | 52 |
| 7pm–8pm | Limited data | 3 | |
| 8pm–9pm | Limited data | 12 | |
| 9pm–10pm | Limited data | 1 | |
| 10pm–11pm | 86.2% | 5.8% | 69 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TPA 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) | 84.5% | -1.6 pts | 0.0% | 71 |
| Christmas & New Year (Dec 20 - Jan 3) | 78.1% | -8.0 pts | 2.0% | 151 |
| Summer peak (Jun 15 - Aug 15) | 78.3% | -7.8 pts | 1.2% | 589 |
| All other days | 86.1% | — | 1.5% | 2,629 |
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).