I need some advice. I want to book 4 flights, one way, and right now for the day I want the system tells me I need to use 35,000 for each one-way flight. Other days are showing up for only 17,500 miles and some are for 30,000. Two agents I spoke to said that it could open up for using only 17,500 miles, but I would be taking a chance to wait. My trip is not until Feb 2015. Any advice on how I can determine when I should stop waiting to see if I can use less miles? Thanks!