United Airlines is the most reliable airline on the SAN to IAH route with a 85% on-time rate, compared to Spirit Airlines at 74%. Based on 6,161 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SAN to IAH
San Diego to Houston — airline reliability comparison
On-Time Rate by Airline
United Airlines85%
Spirit Airlines74%
SAN to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 85% | 1.2% | 72m | 6,161 |
| Spirit AirlinesNKWorst | 74% | 4.3% | 75m | 115 |
Route Overview
84%
Overall On-Time
72m
Avg Delay
1.3%
Cancel Rate
6,278
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.