There are four Wings-flights from / to CMB, but only three are useful for a RTW.
- CMB - DXB (Emirates)
- CMB - KUL (Malaysian Airlines)
- CMB - SIN (Malaysian Airlines)
- CMB - MLE (Malaysian Airlins )
A quite useful flash-program for planning a RTW with the Wings-Alliance can be found here (from the KLM website):
World Ticket Simulation
Don't know about the fares from India or Sri Lanka, but it sounds interesting. Please keep us updated!!!