Best Time to Fly OAK to SAN: On-Time Stats by Hour & Airline
Oakland International → San Diego International
Data through July 2026 · Last updated October 18, 2026
3,214 flights were scheduled from Oakland (OAK) to San Diego (SAN) in the last 12 months, and 65.3% of those that flew arrived on time, 12.3 points below the US average of 77.6%.
Among 3 airlines, Spirit Airlines led with 79.0% on time and Southwest Airlines was last with 64.9%.
Over 24 months, Saturday was the most reliable day (83% on time) and July the worst month (66%).
The cancellation rate was 0.9% (US average 1.8%).
OAK 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 |
|---|---|---|---|---|
| Spirit Airlines | 79.0% | 78 min | 0.0% | 38 |
| SkyWest Airlines | 67.8% | 50 min | 1.1% | 270 |
| Southwest Airlines | 64.9% | 49 min | 0.9% | 2,906 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly OAK to SAN
On-time arrival % by scheduled departure hour (local time), 6,647 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.7% | 6.0% | 84 |
| 6am–7am | 91.9% | 1.3% | 625 |
| 7am–8am | 91.5% | 0.0% | 352 |
| 8am–9am | 82.8% | 0.8% | 515 |
| 9am–10am | 85.7% | 0.7% | 309 |
| 10am–11am | 69.3% | 1.7% | 596 |
| 11am–12pm | 71.3% | 0.0% | 369 |
| 12pm–1pm | 74.0% | 1.2% | 412 |
| 1pm–2pm | 85.8% | 0.5% | 409 |
| 2pm–3pm | 62.3% | 0.7% | 419 |
| 3pm–4pm | 69.1% | 1.0% | 493 |
| 4pm–5pm | 65.8% | 1.4% | 422 |
| 5pm–6pm | 58.4% | 1.0% | 401 |
| 6pm–7pm | 56.5% | 3.1% | 415 |
| 7pm–8pm | 68.0% | 1.0% | 288 |
| 8pm–9pm | 58.6% | 0.9% | 449 |
| 9pm–10pm | 44.0% | 5.6% | 89 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on OAK 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) | 71.6% | -3.8 pts | 0.0% | 134 |
| Christmas & New Year (Dec 20 - Jan 3) | 51.9% | -23.5 pts | 3.3% | 274 |
| Summer peak (Jun 15 - Aug 15) | 66.9% | -8.5 pts | 0.6% | 1,184 |
| All other days | 75.5% | — | 1.2% | 5,055 |
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).