Originally Posted by
lastcallfordeparture
What do you mean by "additional charges"?. If that's true then it'd better just to leave it like that and don't do anything (waste the return).
Purchasing a flight ticket that you do not intend to use (in part) is against the rules and regulations. In principle, at least, the airline has the right to charge you the higher fare that applies for the one-way flight on this route.