My wife and I are considering an extended trip to Thailand in about 1.5 to 2 yrs from now when I finish school. I was looking at getting a rewards card and hopefully get enough points to buy at least one of the tickets.

My first question is whether this would be worth it, and are there any programs that are better for international travel? How many miles does one typically need to earn to get an international ticket? Any other advice on getting cheap travel to this area.

Thanks