Join Date: May 2004
Location: formerly Gold now Diamond, formerly MSY, now LAX, formerly NW, now DL
Programs: Hyatt Plat, Hilton Gold, SPG Gold, Delta Diamond/1MM
Posts: 4,735
So to max your miles on CO, I'd fly as much of CO as you can.
Maybe this CO to India
KLM, AF, NW/Delta, or other ST partner (is there a CO codeshare you can book) back to Europe
Return from Europe on CO or star alliance.
Try having your agent piece this together or expedia/travelocity.