Best Time to Fly IAH to TUS: On-Time Stats by Hour & Airline
George Bush Intercontinental/Houston → Tucson International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.7% of Houston (IAH) to Tucson (TUS) flights arrived on time (206 scheduled flights). That is 6.0 points above the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (89% on time) and December the worst month (69%).
The cancellation rate was 1.9% (US average 1.8%).
IAH to TUS 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 | 83.4% | 63 min | 2.0% | 197 |
| SkyWest Airlines | Limited data | 9 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly IAH to TUS
On-time arrival % by scheduled departure hour (local time), 702 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 90.0% | 1.3% | 232 |
| 10am–11am | 81.6% | 0.0% | 38 |
| 4pm–5pm | Limited data | 3 | |
| 7pm–8pm | 79.3% | 0.0% | 82 |
| 8pm–9pm | 77.6% | 2.0% | 346 |
| 9pm–10pm | 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 TUS
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) | Limited data | 6 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 15 | ||
| Summer peak (Jun 15 - Aug 15) | Limited data | 28 | ||
| All other days | 82.3% | — | 1.5% | 653 |
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).