Flight Reliability
AS 3499 · Alaska Airlines
San Jose → San Diego (SJC–SAN)
- 72%
- Arrive within 15 minutes
- 8 min
- Average arrival delay
- 0.4%
- Cancelled
- 2 min early
- Median arrival delay
Based on 282 historical flights. Data through May 2026.
What the data says
The 12–3 PM departure wins.
AS 3499 departing between 12–3 PM arrived on time 90% of the time, versus 72% between 9 AM–12 PM.
Friday is doing you no favors.
AS 3499 arrived on time 92% of the time on Tuesdays and just 49% on Fridays. That gap is worth planning around.
Lagging the Alaska Airlines network.
AS 3499 arrived on time 72% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 3499 arrived on time 76% of the time over the last three months in the data, compared with 64% in the three months before that.
The breakdown
- Mon67%(46 flights)
- Tue92%(39 flights)
- Wed81%(43 flights)
- Thu75%(47 flights)
- Fri49%(47 flights)
- Sat84%(19 flights)
- Sun68%(40 flights)
- 9 AM–12 PM72%(271 flights)
- 12–3 PM90%(10 flights)
Jun 63% → May 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 27 |
| July 2025 | 78% | 27 |
| August 2025 | 64% | 28 |
| September 2025 | 87% | 30 |
| October 2025 | 74% | 31 |
| November 2025 | 59% | 29 |
| December 2025 | 53% | 19 |
| January 2026 | 80% | 15 |
| March 2026 | 71% | 14 |
| April 2026 | 85% | 26 |
| May 2026 | 72% | 29 |
- Departures on time
- 88%
- Diverted
- 0%
- Flights flown
- 281
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 282 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.