Originally Posted by Academic
Welcome to FT. Lonic_nz
The different letters refer to different fare buckets. So on AC, for example, Y,M,U,B,H are all upgradeable with SWUs. For domestic fares, the letters translate into Freedom, Latitude, Fun, Tango, etc., with mutliple buckets in each of those categories. The fare price declines from left to right.
How does the word FREEDOM become the letter YMUor B. Was there actually a word associated with each letter? If so, where can we see these links.
CFB