"We have of course received from both IndiGo as well as the Tatas indications of interest for the airline (Air India), and then we have received formal indications of interest for other aspects of Air India group. Those are the formal indications we have received so far," Sinha told a television channel.
The minister said that the government is working in a time-bound manner to finish the bidding process and that the expression of interest as well as bids should take six to eight months.
Market leader IndiGo had earlier written to the Ministry of Civil Aviation expressing its interest to buy out Air India's flight operations, particularly the international services.
Ground services providers such as Bird Group and Turkish company Celebi have also shown interest in acquiring ground handling arm Air India Air Transport Services Limited (AIATSL).
Sinha also said that the government has appointed legal, transactional and asset valuer advisors.
On June 28, the Cabinet Committee on Economic Affairs (CCEA) had given its in-principle nod for the strategic disinvestment of Air India and five of its subsidiaries.
Subsequently, an Air India-specific alternative mechanism was set up to guide the process.
The ministerial group is looking into the treatment of Air India's unsustainable debt, hiving off of certain assets to a shell company, demerger and strategic disinvestment of three profit-making subsidiaries, among other aspects.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)