United Airlines is the most reliable airline on the SJU to IAH route with a 84% on-time rate, compared to Spirit Airlines at 76%. Based on 2,964 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SJU to IAH
San Juan to Houston — airline reliability comparison
On-Time Rate by Airline
United Airlines84%
Spirit Airlines76%
SJU to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 84% | 1.0% | 65m | 2,964 |
| Spirit AirlinesNKWorst | 76% | 2.3% | 73m | 305 |
Route Overview
83%
Overall On-Time
70m
Avg Delay
1.2%
Cancel Rate
3,298
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.