It will connect southern Delhi directly with Indira Gandhi International Airport to relieve the increasing traffic, congestion and pollution on roads.

Construction began on the line in June 2022, as part of the fourth phase of the Delhi Metro's development, and is expected to be completed by March 2026.

The plans were finalized for implementation by the Government of Delhi in December 2018; this time the length of the Golden Line increased to 23.6 km (14.7 mi).

Thus, land acquisition for Phase IV and Golden Line began from April 2019, and was completed by three years.

The proposal was approved by the Government of Delhi after the DMRC created and showed a Detailed Project Report (DPR) in December 2023, thereby increasing the line's length to 25.82 km (16.04 mi).