Originally Posted by
MrJBoy
I have Star Alliance one way economy award tickets which include UAX, UA (TATL) and LH (intra-Euro) flights.
Is it possible to exchange the tickets when a business seat becomes available on the TATL flight without canceling the original tickets?
I'm asking this because X on the LH is not available anymore...
You can't exchange an XY ticket for an XC one. You can refund your economy ticket and then use more miles for a business seat.