Best Time to Fly SAN to HOU: On-Time Stats by Hour & Airline
San Diego International → William P Hobby
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.2% of San Diego (SAN) to Houston (HOU) flights arrived on time (962 scheduled flights). That is 6.4 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
September has been the best month (88% on time) and Friday the weakest day of the week (62%).
0.4% of flights were cancelled, versus 1.8% nationally.
SAN 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 | 71.2% | 45 min | 0.4% | 962 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to HOU
On-time arrival % by scheduled departure hour (local time), 1,780 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 88.8% | 0.6% | 325 |
| 7am–8am | 85.4% | 0.7% | 298 |
| 8am–9am | 90.9% | 0.0% | 55 |
| 9am–10am | 82.0% | 0.0% | 39 |
| 10am–11am | Limited data | 5 | |
| 11am–12pm | Limited data | 19 | |
| 12pm–1pm | 76.9% | 0.6% | 174 |
| 1pm–2pm | 60.9% | 0.0% | 139 |
| 2pm–3pm | 50.6% | 0.0% | 175 |
| 3pm–4pm | 78.1% | 0.0% | 32 |
| 4pm–5pm | 47.5% | 0.0% | 40 |
| 5pm–6pm | 92.7% | 0.0% | 41 |
| 6pm–7pm | 52.9% | 0.6% | 156 |
| 7pm–8pm | 62.0% | 1.4% | 209 |
| 8pm–9pm | 50.0% | 1.4% | 73 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN 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) | 81.1% | +6.1 pts | 0.0% | 37 |
| Christmas & New Year (Dec 20 - Jan 3) | 56.1% | -18.9 pts | 1.2% | 83 |
| Summer peak (Jun 15 - Aug 15) | 63.2% | -11.8 pts | 0.0% | 336 |
| All other days | 75.0% | — | 0.7% | 1,324 |
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).