Great work! I have a small question regarding AA. They now book in J instead of A from 11 january. But what happends if I book a trip from for example OSL-LHR-JFK-LAX with J to USA and in the 3 class AA flight from JFK to LAX. Will I then now be put in the business class cabin on the AA flight with J class or will I get the first cabin in A class?

Or maybe if I fly A from LHR to JFK then the onward flight to LAX will be in A also?