Originally Posted by GeoffSmith

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So my questions.
What is the best business class flight from Europe to Buenos Aries?
I can fly to a hub, or drive (with overnight airport hotel). The long-haul can start in Amsterdam, Frankfurt, Paris, Brussels, Zurich, or even London.
I could consider a vacation stop-over before-after the long-haul, and that could be anywhere in the world, e.g. London, Dubai, Singapore, etc.
I would like to build miles on a card, with my new Miles & More, or I could open another card if more useful.
I might even consider taking out a new debit-credit card for the trip if advantageous.
I expect to travel quite a lot in the next few years (recently widowed) so I want to make the right decisions now.

I'm out of my comfort zone, and I will certainly have more questions in the future, but picking my long-haul carrier is the most pressing.
Also when should I book? Best seats?, etc