Originally Posted by KARFA

AA would actually do the refund and calculate it for you. Tbh if you are cancelling half the booking then it should be very roughly half the cost coming back....

Originally Posted by jerry a. laska

Are you sure about that? Knowing how round trip tickets are generally priced I doubt that cancelling the inbound of a return booking having flown the outbound will be roughly half the total cost. I would generally assume that the refund would generally be just taxes and surcharges of the inbound and possibly something more...