i gotta fly to greece (athens) and from bombay. the options economical are AF BOM-CDG-Athens and back the same way. LH offers BOM-FRA-Athens and back. Swiss Air gives BOM-ZRH-Athens which shuld be the best among them in terms of service, on time performence, entertainment, etc it is economy class
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Light travels faster than sound...thats why people appear bright, until you hear them talk!
QR is also an option and I guess KU and GF might have connections as well- Worth looking at if price is a consideration. And for dirt cheap you may try airlines like Egypt Air or Aeroflot!
If QR is qatar airways i wont recommend them as they are upgrading their terminal and transiting from them is one hell of a project. U can fine the details of these horrific projects at the skytrax website