I have an itinerary all business class SYD-LAX (United) LAX - ZRH (Swiss) ZRH-BUD (Swiss) BUD - ZRH (Swiss) ZRH-HKG (Swiss) HKG-SYD (Cathay Pacific)

Guess which airline does not let me make an online seat selection SWISS OF COURSE (it does not exist in my profile) and I was told by Swiss because I have United & Cathay Pacific on my itinerary I cannot make online seat changes.

Who took my money (ticketed) SWISS of course.

I can change seats on United & Cathay Pacific but SWISS do not allow seat changes online,

No wonder airlines like Qatar Emirates & Ethad are so far ahead of European Airlines such as SWISS