Flight Reliability
AS 2491 · Alaska Airlines
San Diego → San Jose (SAN–SJC)
81
Pretty Reliable
WanderNerd Reliability Score
- 84%
- Arrive within 15 minutes
- 7 min
- Average arrival delay
- 2.6%
- Cancelled
- 5 min early
- Median arrival delay
Based on 76 historical flights. Data through May 2026.
What the data says
Wednesdays have been rough.
AS 2491 arrived on time 92% of the time on Mondays and just 62% on Wednesdays. That gap is worth planning around.
A bit ahead of the SAN–SJC route.
AS 2491 arrived on time 84% of the time, versus 79% across the SAN–SJC route.
A bit ahead of the Alaska Airlines network.
AS 2491 arrived on time 84% of the time, versus 80% across the Alaska Airlines network.
The breakdown
- Mon92%(12 flights)
- Tue—(8 flights)
- Wed62%(13 flights)
- Thu80%(10 flights)
- Fri—(7 flights)
- Sat92%(12 flights)
- Sun92%(12 flights)
- 6–9 AM—(6 flights)
- 9 AM–12 PM85%(68 flights)
92%
Mar
Dec 69% → Mar 92% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 69% | 16 |
| January 2026 | 96% | 23 |
| February 2026 | 78% | 23 |
| March 2026 | 92% | 12 |
- Departures on time
- 82%
- Diverted
- 0%
- Flights flown
- 74
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 76 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.