United Airlines is the most reliable airline on the SAN to IAD route with a 87% on-time rate, compared to Alaska Airlines at 82%. Based on 4,115 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: SAN to IAD
San Diego to Washington — airline reliability comparison
On-Time Rate by Airline
United Airlines87%
Alaska Airlines82%
SAN to IAD Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 87% | 1.1% | 83m | 4,115 |
| Alaska AirlinesASWorst | 82% | 1.4% | 51m | 1,135 |
Route Overview
86%
Overall On-Time
76m
Avg Delay
1.2%
Cancel Rate
5,250
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.