Best Time to Fly AUS to SAN: On-Time Stats by Hour & Airline
Austin - Bergstrom International → San Diego International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 74.3% of Austin (AUS) to San Diego (SAN) flights arrived on time (2,561 scheduled flights). That is 3.3 points below the national average of 77.6%.
SkyWest Airlines was the most punctual of the 3 airlines on the route at 80.7%, while Southwest Airlines trailed at 69.5%.
August has been the best month (82% on time) and Thursday the weakest day of the week (68%).
1.2% of flights were cancelled, versus 1.8% nationally.
AUS 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 |
|---|---|---|---|---|
| SkyWest Airlines | 80.7% | 59 min | 1.7% | 1,036 |
| Frontier Airlines | 76.9% | 68 min | 1.9% | 106 |
| Southwest Airlines | 69.5% | 51 min | 0.7% | 1,419 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly AUS to SAN
On-time arrival % by scheduled departure hour (local time), 4,623 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 88.5% | 1.2% | 1,033 |
| 7am–8am | 85.3% | 0.3% | 328 |
| 8am–9am | 88.0% | 0.0% | 51 |
| 9am–10am | Limited data | 23 | |
| 10am–11am | 75.2% | 0.8% | 118 |
| 11am–12pm | 75.8% | 0.0% | 178 |
| 12pm–1pm | 80.7% | 0.0% | 250 |
| 1pm–2pm | 83.2% | 0.9% | 210 |
| 2pm–3pm | 72.5% | 0.6% | 697 |
| 3pm–4pm | 80.5% | 1.3% | 157 |
| 4pm–5pm | 71.5% | 0.6% | 180 |
| 5pm–6pm | 60.3% | 0.4% | 259 |
| 6pm–7pm | 57.9% | 0.6% | 180 |
| 7pm–8pm | 62.2% | 2.9% | 343 |
| 8pm–9pm | 52.3% | 1.0% | 308 |
| 9pm–10pm | 59.3% | 1.9% | 308 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on AUS 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) | 82.6% | +6.4 pts | 1.1% | 87 |
| Christmas & New Year (Dec 20 - Jan 3) | 65.2% | -10.9 pts | 1.0% | 195 |
| Summer peak (Jun 15 - Aug 15) | 68.1% | -8.1 pts | 1.2% | 824 |
| All other days | 76.1% | — | 0.9% | 3,517 |
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).