My apologies if this should not be a new thread, I am new to the site. I am planning to take a couple of trips this August with my wife to Alaska and Australia. I was interested in trying to either sign up for a credit card to get enough miles to defray the costs or at least get the benefit of racking up a number of miles from the purchase of those tickets. Also, I would be interested in a card that would help with free/cheaper seat upgrades.

If anyone has any thoughts of the best strategy to maximize my miles or end up with decent deals to either of those places, I would be very appreciative. Again, sorry if this is not posted in the right place. Thanks!