I have to book a phx-lhr flight leaving 6/9 returning 6/14. Are there any tips/tricks etc I should be aware of in obtaining my best chance of getting the swu redeemed or is it just a crap shoot? I know it has to be on CO metal, and if I know my chances are good I'll definitely book the phx-iah-lhr trip as I"d like to be in BF as long as possible. Then again, if my chances are crap, I'd rather fly through ewr instead to make my trip in coach as short as possible. ugggh!