Flight Check

Best Airline: IAD to SFO

Washington to San Francisco — airline reliability comparison

United Airlines is the most reliable airline on the IAD to SFO route with a 80% on-time rate, compared to Alaska Airlines at 72%. Based on 8,540 flights tracked.

This route involves high-congestion airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

United Airlines80%
Alaska Airlines72%

IAD to SFO Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest80%1.1%71m8,540
Alaska AirlinesASWorst72%1.4%63m1,253

Route Overview

79%
Overall On-Time
70m
Avg Delay
1%
Cancel Rate
9,805
Total Flights
IAD to SFO Route DetailsReturn: SFO to IAD
IAD AirportSFO Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.