Originally Posted by
Savage25
SQ is in Terminal 2C and I think LX is in Terminal 2A. I don't think one could transit between the two terminals before without going through immigration, but when I was there in December, they had consolidated the previously separate immigration counters into a common one for both terminals, so I think it should now be possible to transit airside between the two.
Kiwi is talking about CX, not LX. CX also is on the 2A side like LX, though:
http://www.aai.aero/mumbai/passenger_info.jsp
SQ uses Air India for ground handling, so they are on the better AI 2C in BOM. In the good old days when 2B was still open you could walk from A to C. The connection still exists airside, but not on the duty free side (in BOM security happens at the gate). There is a AI agent standing near the 'transfer gate' with a security/police person. If you want to transit, you approach that guy and don't follow the masses down to the immigration desks. I've done a LX-AI transfer (AI flies BOM-CCU from 2C) that way. The best way is to call your airline at the airport:
http://www.aai.aero/mumbai/operating_airlines.jsp