Like others have said it depends where you are located and what airline you would use the most. I live in MN and it is ruled by NorthWest Airlines. While we tend to have alot of complaints about them, apparently they were rated the top FF mile program (World Perks) according to Comsumer Reports. They have worked out well for me and have been able to get to Florida and Canada with as little as 21,000 miles (25,000 with a 4000 mile off coupon they send me yearly). Can't complain, free is always best. There is a 50$ yearly fee but it has been well worth it for us! We collect about 2/3 of our yearly miles with the CC (one mile per dollar spent) and other offers make up the rest. We also charge everything possible on the card and always pay it off on a monthly basis. Hope that helps.