I am looking to book a flight on Avianca & credit to MP. From what I can tell, UA has
this fare chart for Avianca. However, Avianca seems to
have switched to a "simple" system with only XS, S, M, L, XL, and XXL fares. I don't see any way to correlate these fares to the UA chart without issues (e.g., L seems like a cheaper fare on the UA chart than M, which does not seem to be the case in Avianca world). Any *A veterans willing to help? I searched the forum and couldn't find an answer.