That's also a good way to go. I believe you can travel by rail all the way from the airport into DC
If you come through Dulles, you have to take a shuttle bus from the airport to the Wiehle Ave. Metro station, but that's a minor inconvenience.
If you fly in to National Airport, the Metro station is across the street.
upon further review BWI is not an option since they require rona test to fly out it appears Also Md. Stasi probably collecting information upon landing