Originally Posted by
rcspeirs
I have done this. Can't be done online. You need to speak to an agent who splits one passenger onto a different ticket number first, then the flight for passenger A can be amended without affecting the booking for passenger B.
The OP would firstly have to call BA as this can't be done online, which will normally trigger the offline service fee.
The original PNR will then be split with one ticket in the original PNR and the other in a new PNR. That should then enable one or other or both tickets to be changed or cancelled within the constraints of the fare rules.
Cancellation should be possible online, as should change of date and/or time, if the fare rules allow. Change from return to one-way can only be done on the phone, although if done as part of the PNR split transaction would only incur the single offline service fee.
However, changing a Q outbound / R inbound to a single J inbound, even if possible within the fare rules, would probably be prohibitively expensive, even without the offline service fee.
To
Globaliser, what I suspect the OP did was select a return in whY, then saw there was a good price for the inbound in J, changed the inbound to J which then booked into R.
In which case the Q fare rules apply to the outbound and the R fare rules apply to the inbound.