At a Glance

The A Line opened on April 22, 2016 and was RTD’s first commuter rail line. The 23-mile rail line travels between Denver’s Union Station and Denver International Airport (DEN).


Station A-Line Graphic

Type: Electric commuter rail

Length: 23 miles

Stations: 8

Park-n-Rides: 6

Parking: 4,329 spaces (8,700 total planned)

Station A-Line Map
Updated October 2023