Spirit Airlines is the most reliable airline on the IAH to SAN route with a 83% on-time rate, compared to United Airlines at 80%. Based on 115 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to SAN
Houston to San Diego — airline reliability comparison
On-Time Rate by Airline
Spirit Airlines83%
United Airlines80%
IAH to SAN Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Spirit AirlinesNKBest | 83% | 3.2% | 49m | 115 |
| United AirlinesUAWorst | 80% | 1.1% | 62m | 6,162 |
Route Overview
80%
Overall On-Time
63m
Avg Delay
1.1%
Cancel Rate
6,279
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.