Flight Check

Best Airline: SFO to IAD

San Francisco to Washington — airline reliability comparison

United Airlines is the most reliable airline on the SFO to IAD route with a 82% on-time rate, compared to Alaska Airlines at 77%. Based on 8,548 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 Airlines82%
Alaska Airlines77%

SFO to IAD Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest82%1.0%65m8,548
Alaska AirlinesASWorst77%1.1%56m1,254

Route Overview

81%
Overall On-Time
64m
Avg Delay
0.9%
Cancel Rate
9,813
Total Flights
SFO to IAD Route DetailsReturn: IAD to SFO
SFO AirportIAD Airport

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