My elderly parents are booked LHR-BDA / BOS-LHR in economy. They chose the day flight BOS-LHR which BA has cancelled and they are very unhappy to have been moved to the red-eye.
If they have to take a red-eye, I’d like to get them into business class. They (and/or I) have enough AA miles to redeem each of them a 57k+taxes/fees ticket for the BOS-LHR leg. Can they refund just the return leg without repricing LHR-BDA to an expensive one way fare and rebook the return as a separate PNR in business using their AA miles?
if not, what do you recommend?