The long awaited partial opening of the Silver Line is due on 26 July. This will get you nearer to Dulles Airport but not quite there. The extension to serve Dulles is due in 2018. There will be a reduction in the Blue Line service to accommodate the extra trains using the tunnel.
However, the previous cost-effective option of taking the Washington Flyer bus to West Falls Church is changing to becoming an option to take the same bus to Wiehle-Reston East and then the new Silver Line in to Downtown.
The fare to West Falls Church is currently $10. It will be $5 to/from Wiehle-Reston East station.
The ribbon opening for the new station is at 10am on 19 July – details here.