I'm so afraid to do it that way, afraid that once I commit to one way, then the other way the price in miles on the date I want will be sky high! I've never done it that way, either for revenue tickets or FF. I guess that logically you stand a better chance of getting what you want at a good miles amount, because a lot of people like me are afraid to take the chance. We're going to try to book on Delta for June next year to use up my miles and I haven't booked FF tickets on Delta in a very long time, if ever..