The Aerogold costs $120/yr. If you can charge $25k of "pointsworthy" purchases to it each year, that's the equivalent of a free ticket for anywhere in N America for $120. And if you charge only $15k, it's still a "regional" ticket for $120. Sounds pretty good, assuming you're paying off the card every month. If not, you have to add in interest charges - could be fairly expensive at 19.5%. Also, while you get some extra benefits with the Aerogold card, you have to factor in any benefits from the other cards that aren't available with the Aerogold.