The silver line extension (hopefully opening by thanksgiving) includes a stop at IAD (Dulles airport, the third airport in the DC area class B airspace) as well.
However, transit infrastructure is locked in once, built, so almost every other transit system in the country has this issue, because it was built before 2021.
https://www.vice.com/en/article/z3v5j3/us-airports-no-longer...