Henky,


I have done something like this.

EDI-LHR-JFK (WT) and then back JFK-LHR-ATH (WT+) on the same ticket (400E total). I asked from a BA's agent over the phone to search it and it was difficult for him to do it. He hang up and called me after 20 minutes to tell me that he can do it.^


I believe that the one that you are asking (WT+ and CW) must be easier but you have to find someone who actually cares and is willing to search for this (many times I had an answer that the one I was asking was not possible).

I would suggest you to call them and ask them for specific things. You should know the fare that you are asking for, as IME many of those agents are not very good, sometimes you have to explain them the limitations that a ticket can have so they could understand what you are asking.