Join Date: Jun 2008
Location: PBI / JFK, ISP, LGA
Programs: AA, AS, AV, B6, DL, F9, WN
Posts: 868
If I were you, I would join AA's FF program. The most important thing is to be a member of a FF program that flies to where you want to visit. AA gives you more options in Latin America.
Most here are also members with other programs as well. One airline in each alliance is a good idea. AA is part of Oneworld.
Buying miles is for people who need a set number on miles for particular trip fast. I never have bought miles, but many people I know have in order to be able obtain an award ticket.
Welcome to FT!