Tks DaveSFO for your comments!

But those points you mentioned are clear to me. What I always do is telling my TA to reserve for me the lowest eco class which earns me TG miles. However, I have to tell my TA the booking class as he is not very familiar which booking class earns TG miles and which does not. Eg., for TG, I always tell him to book Q- class which is the lowest (=cheapest) eco class on TG which earns you TG miles.

Now I want to tell my TA, which booking class he should book for me on UA. But by doing so, I have to know which is the lowest booking class on UA which earns me miles on TG (and if this one is already sold out, then the 2nd lowest booking class and so on...).

I assume, the order of UA eco booking class which earns me TG miles might be V, Q, H, U, E, M (lowest to highest), since UA seems to show on their webpage the highest booking classes always at the beginning and W class is the first booking class, which does not make you earn TG mile.

Would be great if somebody could reconfirm my assumptions.

Otherwise, I will have to drop UA an email and ask them for the order of their eco booking classes and eliminate those booking classes mentioned by TG, which don't earn me TG miles...

Cheers ^