Etihad has high hopes from Jet Airways deal in which it bought out majority stake in 2013.
CPI-M says it is ready to forge a front with Congress in Parliament on issues like land bill and secularism but ruled out being part of a national front.
Apart from Air India, the implementation of the airport hub project would involve the airport authorities, other Star Alliance partner airlines which operate from the two airports and ground handling agencies, among others, to make it easier for smooth transfer of passengers from one flight to another.
Full-service airline Tata-SIA, submitted its application for the grant of Air Operator's Permit (AOP or flying license) in April.