Best Time to Fly SAT to HOU: On-Time Stats by Hour & Airline
San Antonio International → William P Hobby
Data through July 2026 · Last updated October 18, 2026
1,347 flights were scheduled from San Antonio (SAT) to Houston (HOU) in the last 12 months, and 75.1% of those that flew arrived on time, 2.5 points below the US average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Tuesday was the most reliable day (83% on time) and July the worst month (65%).
The cancellation rate was 0.3% (US average 1.8%).
SAT to HOU 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 |
|---|---|---|---|---|
| Southwest Airlines | 75.1% | 51 min | 0.3% | 1,347 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAT to HOU
On-time arrival % by scheduled departure hour (local time), 2,862 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.6% | 0.8% | 261 |
| 6am–7am | 93.0% | 0.6% | 358 |
| 7am–8am | 90.7% | 0.0% | 119 |
| 8am–9am | 84.4% | 0.4% | 227 |
| 9am–10am | 90.4% | 1.9% | 107 |
| 10am–11am | 89.3% | 0.0% | 103 |
| 11am–12pm | 88.2% | 0.9% | 112 |
| 12pm–1pm | 69.3% | 0.5% | 206 |
| 1pm–2pm | 79.3% | 1.6% | 123 |
| 2pm–3pm | 81.1% | 0.0% | 74 |
| 3pm–4pm | 74.1% | 0.0% | 58 |
| 4pm–5pm | 76.1% | 0.5% | 198 |
| 5pm–6pm | 46.1% | 0.0% | 141 |
| 6pm–7pm | 62.2% | 0.6% | 322 |
| 7pm–8pm | 66.7% | 0.5% | 224 |
| 8pm–9pm | 67.1% | 0.0% | 210 |
| 9pm–10pm | Limited data | 19 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAT to HOU
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) | 89.3% | +10.7 pts | 0.0% | 56 |
| Christmas & New Year (Dec 20 - Jan 3) | 83.6% | +5.1 pts | 0.0% | 116 |
| Summer peak (Jun 15 - Aug 15) | 72.8% | -5.8 pts | 0.2% | 482 |
| All other days | 78.6% | — | 0.6% | 2,208 |
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).