Best Time to Fly SJC to IAH: On-Time Stats by Hour & Airline
Norman Y. Mineta San Jose International → George Bush Intercontinental/Houston
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.8% of San Jose (SJC) to Houston (IAH) flights arrived on time (215 scheduled flights). That is 1.8 points below the national average of 77.6%.
United Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (83% on time) and June the worst month (61%).
The cancellation rate was 0.0% (US average 1.8%).
SJC 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 | 75.8% | 63 min | 0.0% | 215 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SJC to IAH
On-time arrival % by scheduled departure hour (local time), 467 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | 94.9% | 0.0% | 79 |
| 10am–11am | Limited data | 1 | |
| 11am–12pm | Limited data | 1 | |
| 12pm–1pm | 66.7% | 1.7% | 58 |
| 1pm–2pm | 73.8% | 0.0% | 244 |
| 3pm–4pm | Limited data | 1 | |
| 5pm–6pm | Limited data | 1 | |
| 10pm–11pm | 90.3% | 6.1% | 33 |
| 11pm–12am | 83.7% | 0.0% | 49 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SJC 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) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 15 | ||
| Summer peak (Jun 15 - Aug 15) | 62.3% | -22.4 pts | 0.0% | 122 |
| All other days | 84.7% | — | 0.6% | 316 |
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).