how can i get from dulles airport to bethesda maryland?
Its not difficult, just time consuming. You take the Washington Flyer Coach from Dulles AIrport to connect you to the metro (I think it takes you to the Falls Church station). The Metro is pretty easy to figure out and will eventually connect you right to the Bethesda station which is on the red line. The coach bus leaves every 1/2 hour from the airport. If you go to the website for Dulles airport (just google) you can get more specific info about where exactly to get the coach service.