Washington Dulles International Airport Rosslyn Metro station in Arlington and terminates at the L'Enfant Plaza Metro station in Southwest DC. Rosslyn can be accessed by the Orange, Blue, and Silver lines, while L'Enfant Plaza is also served by the Yellow and Green lines. Washington Flyer's Silver Line Express bus service operates roughly every 15–20 minutes between the airport and the Wiehle – Reston East Metro station. This service will be permanently discontinued when Phase II of the Silver Line opens in 2020. Passengers connecting to the Shenandoah Valley can use the Shenandoah Valley Commuter Bus, which connects to the Vienna and Rosslyn Metro stations.
Miles City Airport Miles City Airport Miles City Airport or Frank Wiley Field is a city-owned airport two miles northwest of Miles City, in Custer County, Montana. The airport was served by one airline, subsidized by the Essential Air Service program. EAS subsidies ended July 15, 2013 due to subsidy per passenger exceeding $1000, leaving Miles City without scheduled air service. Federal Aviation Administration records say the airport had 264 passenger boardings (enplanements) in calendar year 2008, 891 in 2009 and 1,033 in 2010. The National Plan of Integrated Airport Systems for 2011–2015 called it a "general aviation" airport (the "commercial service" category