Originally Posted by
yhm71
It looks like if you choose an outbound/inbound with a codeshare segment (e.g. AC) it books in P class, if all LH it books (sometimes at least) in Z. P gets 100% miles on Aeroplan but is excluded from the COS bonus. Z gets 150%. (But the P segment on AC should still get you 150%). I don't think there is a 0% earning LH business fare.
Aeroplan website:
"Earn 50% bonus miles for flying in First or Business Class (Excluding Booking Class P)"
https://www4.aeroplan.com/earn_miles...fthansaAirways
You are right that P does not give one COS. Only basic mileage credits. Z gives one 50% COS on Aeroplan. Thanks for the warning which I am totally surprised at. LH Buz class sucks anyway. Swiss is much better.