I'll be working in India for the next six months and plan on using my location there to stage a DONE3 to combine a trip home with a mega-MR. Oneworld.com shows the following fares:
exBangladesh is feasible, though it will take a bit more for me to get to Dhaka. exCMB is challenging because there's only one OW flight to/from there. I spoke to the AA RTW desk and they said if I can't terminate my DONE3 in CMB, I can't originate there. After thinking about it, I don't see anything in the rules that say the final segment can't be a land segment, so I put this together -
I would do the intinerary up to LAX and then fly back to India to complete my time there. The balance of the itinerary would be vacation / MR later in the year. Mileage Monkey calls it valid and the Oneworld Round the World Planner doesn't complain too much..

The question is has anybody flown an exCMB ONE and had a problem with not being able to return to the origin?

thanks,
Silverado