Wellington Carhouse, the primary repair and maintenance facility for the Orange Line, is located adjacent to the station.

Wellington Yard, the primary maintenance and storage facility for the Orange Line fleet, is located west of the station.

Wellington is a major MBTA bus transfer station, with service to Medford, Everett, Malden and other surrounding cities.

[13][14][15] Unlike the Washington Street Elevated which was built at the same time with a similar design, the Charlestown El was located very near Boston Harbor and the Mystic River tidal estuary, and was thus continually exposed to accelerated corrosion caused by salt air.

[16] Wellington Yard opened on July 15, 1975, followed by the station on September 6, as part of the second phase of the Haymarket North Extension.

[18] From February 1 to December 16, 1981, Malden Center and Oak Grove stations were closed on Sundays as part of systemwide austerity program.

[17][20] The entire Orange Line, including Wellington station, was closed from August 19 to September 18, 2022, during maintenance work.

[22][23] In 1969, Mayor and State Representative John McGlynn sponsored the first of two bills to permit air rights development over the station and Route 16.

The same year, Medford received a letter of agreement from the MBTA to build a parking garage over the tracks and the planned maintenance facility to free up development space.

These plans also called for the 16/28 intersection to be partially grade separated, and a traffic circle to replace the blind underpass used for automobile and bus access to the station.

[28][29] Some of the property fronting the Mystic River has been turned into parkland; the first three of four stages of the 1.3 miles (2.1 km) Wellington Greenway opened in November 2012.

The trail, funded by the Massachusetts Environmental Trust and developers Preotle, Lane & Associates, runs partially along the embankment of the Haverhill Line's former Mystic River drawbridge.

[33] Constructed by Poma-Otis Transportation Systems, a joint venture of Poma and the Otis Elevator Company, the people mover consisted of a pair of independent cable-hauled cars on two parallel tracks.

[34] Each eight-seat glass sided car could carry up to 45 passengers or 7,200 pounds (3,300 kg) resulting in a maximum capacity of 1,600 people per hour per direction.

The frequent breakdowns and service outages frustrated riders to such an extent that 91% of users preferred replacing the people mover with a walkway, according to a 2004 survey of 240 Wellington commuters conducted by National Development, owners of the Station Landing property.

[35] In August 2006, less than ten years after it first opened, the people mover was demolished, and an above-ground covered walkway was constructed on top of the existing viaduct structure.

[38] Under draft plans released in 2008, Urban Ring buses would have used dedicated bus lanes paralleling Route 16, with a BRT platform in the existing station busway.