I use cash back credit cards, but in thoughts of a NZ trip next year, am thinking of applying for some airlines/travel cards in order to get the bonus points and hopefully a free flight. Initial searching makes it sound like a flight through Sydney would give a better opportunity at finding a business seat. Also the cards/bonus rewards (currently) that seem to help achieve this are: Chase United MileagePlus, Chase Sapphire Preferred, and US Airways MC. Origin would be LAX, stopoff in Sydney would be great (not sure if time would allow other destinations - ie Fiji) ending in New Zealand. As I'm new to airline rewards and miles, are those the best cards to sign up for and try to maximize bonus points for this trip? Am I blindly missing and going about it wrong? thanks in advance!