Best Time to Fly SAN to SAT: On-Time Stats by Hour & Airline
San Diego International → San Antonio International
Data through July 2026 · Last updated October 18, 2026
610 flights were scheduled from San Diego (SAN) to San Antonio (SAT) in the last 12 months, and 69.9% of those that flew arrived on time, 7.8 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 (80% on time) and June the worst month (62%).
The cancellation rate was 0.7% (US average 1.8%).
SAN to SAT 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 | 69.9% | 55 min | 0.7% | 610 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to SAT
On-time arrival % by scheduled departure hour (local time), 1,280 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | Limited data | 16 | |
| 7am–8am | Limited data | 21 | |
| 8am–9am | 81.8% | 0.0% | 198 |
| 9am–10am | 84.3% | 0.0% | 210 |
| 10am–11am | 88.9% | 0.0% | 99 |
| 11am–12pm | Limited data | 13 | |
| 12pm–1pm | Limited data | 13 | |
| 1pm–2pm | 80.0% | 0.0% | 30 |
| 2pm–3pm | Limited data | 5 | |
| 3pm–4pm | 70.0% | 0.0% | 31 |
| 4pm–5pm | 90.0% | 0.0% | 60 |
| 5pm–6pm | 63.4% | 0.0% | 71 |
| 6pm–7pm | 60.0% | 1.5% | 203 |
| 7pm–8pm | 60.7% | 0.4% | 246 |
| 8pm–9pm | 40.3% | 3.1% | 64 |
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 SAT
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 | 25 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 55.0% | -20.3 pts | 0.0% | 60 |
| Summer peak (Jun 15 - Aug 15) | 64.5% | -10.9 pts | 1.2% | 245 |
| All other days | 75.3% | — | 0.3% | 950 |
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).