Alaska Airlines is the most reliable airline on the SJC to SAN route with a 86% on-time rate, compared to Frontier Airlines at 72%. Based on 168 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SJC to SAN
San Jose to San Diego — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines86%
Spirit Airlines81%
SkyWest Airlines81%
Southwest Airlines77%
Frontier Airlines72%
SJC to SAN Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 86% | 0.9% | 43m | 168 |
| Spirit AirlinesNK | 81% | 1.0% | 63m | 892 |
| SkyWest AirlinesOO | 81% | 0.8% | 55m | 4,391 |
| Southwest AirlinesWN | 77% | 1.0% | 47m | 14,453 |
| Frontier AirlinesF9Worst | 72% | 0.0% | 55m | 129 |
Route Overview
78%
Overall On-Time
49m
Avg Delay
1%
Cancel Rate
20,045
Total Flights
Flying out of SJC? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.