Best Time to Fly SAN to ATL: On-Time Stats by Hour & Airline
San Diego International → Hartsfield-Jackson Atlanta International
Data through July 2026 · Last updated October 18, 2026
2,378 flights were scheduled from San Diego (SAN) to Atlanta (ATL) in the last 12 months, and 85.8% of those that flew arrived on time, 8.2 points above the US average of 77.6%.
Among 2 airlines, Delta Air Lines led with 86.6% on time and Alaska Airlines was last with 77.6%.
Over 24 months, Wednesday was the most reliable day (86% on time) and December the worst month (71%).
The cancellation rate was 0.7% (US average 1.8%).
SAN to ATL 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 | 86.6% | 73 min | 0.7% | 2,167 |
| Alaska Airlines | 77.6% | 56 min | 0.5% | 211 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SAN to ATL
On-time arrival % by scheduled departure hour (local time), 4,886 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 92.6% | 0.8% | 730 |
| 7am–8am | 78.3% | 0.6% | 159 |
| 8am–9am | 79.2% | 1.2% | 743 |
| 9am–10am | 54.8% | 3.7% | 108 |
| 10am–11am | 83.3% | 0.0% | 217 |
| 11am–12pm | 78.0% | 0.4% | 798 |
| 12pm–1pm | 80.7% | 0.0% | 366 |
| 1pm–2pm | 84.3% | 0.0% | 140 |
| 2pm–3pm | 80.1% | 0.7% | 578 |
| 3pm–4pm | 90.6% | 3.0% | 33 |
| 4pm–5pm | Limited data | 1 | |
| 9pm–10pm | 84.3% | 0.7% | 289 |
| 10pm–11pm | 88.4% | 0.7% | 724 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SAN to ATL
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) | 84.5% | -0.7 pts | 0.0% | 103 |
| Christmas & New Year (Dec 20 - Jan 3) | 58.2% | -26.9 pts | 1.5% | 204 |
| Summer peak (Jun 15 - Aug 15) | 78.0% | -7.1 pts | 1.3% | 872 |
| All other days | 85.2% | — | 0.6% | 3,707 |
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).