Best Time to Fly TUS to SAN: On-Time Stats by Hour & Airline
Tucson International → San Diego International
Data through July 2026 · Last updated October 18, 2026
654 flights were scheduled from Tucson (TUS) to San Diego (SAN) in the last 12 months, and 76.2% of those that flew arrived on time, 1.5 points below the US 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 (90% on time) and October the worst month (67%).
The cancellation rate was 0.5% (US average 1.8%).
TUS 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 | 76.2% | 60 min | 0.5% | 654 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly TUS to SAN
On-time arrival % by scheduled departure hour (local time), 1,267 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 95.7% | 0.0% | 47 |
| 6am–7am | 95.3% | 0.0% | 171 |
| 7am–8am | 93.1% | 1.0% | 204 |
| 8am–9am | 94.4% | 0.0% | 90 |
| 9am–10am | 91.5% | 0.0% | 94 |
| 10am–11am | Limited data | 25 | |
| 11am–12pm | 92.5% | 0.0% | 40 |
| 12pm–1pm | Limited data | 26 | |
| 1pm–2pm | Limited data | 23 | |
| 2pm–3pm | Limited data | 27 | |
| 3pm–4pm | Limited data | 4 | |
| 4pm–5pm | 66.2% | 0.0% | 65 |
| 5pm–6pm | 65.7% | 0.7% | 136 |
| 6pm–7pm | 59.6% | 0.0% | 198 |
| 7pm–8pm | 49.0% | 2.0% | 102 |
| 8pm–9pm | Limited data | 15 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on TUS 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 | 23 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 69.6% | -11.3 pts | 6.1% | 49 |
| Summer peak (Jun 15 - Aug 15) | 75.2% | -5.6 pts | 0.0% | 227 |
| All other days | 80.8% | — | 0.2% | 968 |
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).