MFU on miles booking
I've looked for the answer for this, I really have, but can't find it.
I have a flight booked to the USA, going out in Club and back in First. The reason for this was down to the amount of miles I held at the time of booking.
I've now got enough to upgrade the Club booking to First, am I able to do this within the rules of the system? It's an Amex 241 booking.
Thanks for any assistance.
GL