(Lifetime) "Platinum" member here with roughly 100,000 mi. in the account, even after redeeming for F-class Hawai'i travel later this year. I have made decisions like the following quite a bit, but for whatever reason am having trouble making up my mind this time. Have a chance to go to MLB Spring training in early March in greater Phoenix (me only - party of one), and much to my surprise, F-class "MilesAAver" seats are available ICT-DFW-PHX for the dates I want to go. That would be 50,000 mi. RT, plus $10 T.S.A. fee. Also available are super-discounted coach fares, showing at $111 outbound and $121 back, which if I understand correctly now include most if not all taxes and fees. That's pretty cheap, of course, but I almost always insist on flying F and am fresh-out of "stickers". I would need six to cover these flights, so that would be an additional $180, for a total of $412. Also, there is of course the possibility that unlike redeeming MilesAAver F-class, the sticker upgrades on the Arizona legs would not clear for a "Platinum" member. Even at the rule-of-thumb valuation of two cents a mile, $412 is cheaper than 50,000 miles that equates to $1,000 (plus $10 for the T.S.A.), but somehow, I'm tempted just to use the miles to make it 'eAAsy' and certain. I know the math doesn't quite make sense, but I just can't talk myself out of my tentative conclusion. Any advice?