I am pretty sure the answer to this is no... but is it possible to add a paid booking to a a reward flight? I have PKX-LHR BA F booked and there is a CZ flight CSX-PKX that I would like to add to it. BA sells it as a revenue ticket (albeit not a codeshare) CSX-LHR so they do have access to inventory using BA ticket stock. It gives a 2hr30 transit time so I don't think I would take the risk if on separate tickets and would fly the night before to PKX although that is not ideal.