Alaska Airlines is the most reliable airline on the SEA to SAT route with a 78% on-time rate. Based on 2,044 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SEA to SAT
Seattle to San Antonio — airline reliability comparison
On-Time Rate by Airline
Alaska Airlines78%
SEA to SAT Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Alaska AirlinesASBest | 78% | 0.5% | 40m | 2,044 |
Route Overview
77%
Overall On-Time
40m
Avg Delay
0.5%
Cancel Rate
2,044
Total Flights
Flying out of SEA? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.