Best Time to Fly ATL to SJC: On-Time Stats by Hour & Airline
Hartsfield-Jackson Atlanta International → Norman Y. Mineta San Jose International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 86.0% of Atlanta (ATL) to San Jose (SJC) flights arrived on time (901 scheduled flights). That is 8.4 points above the national average of 77.6%.
Delta Air Lines was the only reporting airline with regular flights on this route.
September has been the best month (93% on time) and Sunday the weakest day of the week (80%).
1.3% of flights were cancelled, versus 1.8% nationally.
ATL to SJC 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 |
|---|---|---|---|---|
| Delta Air Lines | 86.0% | 51 min | 1.3% | 901 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ATL to SJC
On-time arrival % by scheduled departure hour (local time), 1,753 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 93.6% | 2.0% | 49 |
| 9am–10am | 91.3% | 0.5% | 575 |
| 10am–11am | 83.5% | 1.2% | 86 |
| 4pm–5pm | 79.2% | 1.3% | 78 |
| 5pm–6pm | 80.7% | 0.5% | 224 |
| 6pm–7pm | 85.7% | 0.9% | 106 |
| 7pm–8pm | 83.3% | 0.8% | 248 |
| 8pm–9pm | 82.2% | 1.6% | 387 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ATL to SJC
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) | 75.8% | -11.9 pts | 0.0% | 33 |
| Christmas & New Year (Dec 20 - Jan 3) | 87.5% | -0.1 pts | 1.2% | 82 |
| Summer peak (Jun 15 - Aug 15) | 78.6% | -9.0 pts | 1.4% | 351 |
| All other days | 87.6% | — | 0.8% | 1,287 |
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).