Basically what primetime23 is saying, that there is lots of availability. You could take any flight FRA-MCO within the two week period stated and get an award in F. Not sure you can book an award prior to 330 in advance, but give it a try. If it doesn't work, just call US airways tomorrow and you should still be fine. I often book exactly this route in C or F, either for my girlfriend & myself or my parents and availability is quite good even 2-3 months in advance.