A test flight to start regular services, which will be operated by the Air India's regional arm Alliance Air, has already been carried out and the airline is now awaiting a final nod from the aviation regulator, DGCA, a source close to the development said.
The airline plans to deploy a 42-seater ATR plane to cater to the new destination, the source said.
Air India is keen to resume services to Shimla at the earliest and take the first mover advantage as the tourists flock to the Himachal Pradesh capital to beat the scorching heat of north India, the source told PTI.
Significantly, Shimla is also one of the 70 airports chosen for operating flights under the government's regional connectivity scheme, UDAN.
According to the source, once the DGCA approval comes by, which is expected within this week, the airline will take no time in mounting a flight from Shimla airport.
The airport at Jubbarhatti, which is 22 km from Shimla and is located 2,196 metres above sea-level, was shut for scheduled flights since September 6, 2012.
"We are aiming to resume operations at the earliest as the summer rush to the Himalayan mountain town has already begun and it would put us in an advantageous position," the source said.