Best Time to Fly SAT to SAN: On-Time Stats by Hour & Airline
San Antonio International → San Diego International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.0% of San Antonio (SAT) to San Diego (SAN) flights arrived on time (610 scheduled flights). That is in line with the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (86% on time) and June the worst month (66%).
The cancellation rate was 0.3% (US average 1.8%).
SAT to SAN 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 | 78.0% | 54 min | 0.3% | 610 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAT to SAN
On-time arrival % by scheduled departure hour (local time), 1,243 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 93.4% | 0.0% | 273 |
| 7am–8am | 93.8% | 0.0% | 145 |
| 8am–9am | 87.8% | 0.0% | 92 |
| 9am–10am | 91.1% | 0.0% | 56 |
| 10am–11am | 88.2% | 0.0% | 34 |
| 11am–12pm | Limited data | 16 | |
| 12pm–1pm | 82.9% | 0.0% | 35 |
| 1pm–2pm | Limited data | 7 | |
| 3pm–4pm | Limited data | 27 | |
| 4pm–5pm | Limited data | 13 | |
| 5pm–6pm | 80.4% | 0.0% | 170 |
| 6pm–7pm | 64.3% | 1.2% | 170 |
| 7pm–8pm | 57.0% | 0.7% | 143 |
| 8pm–9pm | 42.6% | 0.0% | 61 |
| 10pm–11pm | 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 SAT to SAN
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) | 58.2% | -24.3 pts | 1.7% | 60 |
| Summer peak (Jun 15 - Aug 15) | 73.1% | -9.4 pts | 0.0% | 245 |
| All other days | 82.5% | — | 0.2% | 913 |
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).