Overview
Washington Metro operate the Silver Line to the city centre. There are four trains an hour between 5:10 and 22:53: journey time is around 50 minutes depending on your destination. Fare - again, depending on destination - is around $3.85 (December 2022). The trip planner is at https://www.wmata.com/schedules/trip-planner/: note that the airport is listed under its full name (Washington Dulles International Airport).
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