I have a BX1A award (plan ahead, main cabin, 2K) that I have to use before the end of this year. Are you able to book 1 portion of the roundtrip (the other date I want won't be available to select for another week) now and then do the return once the date becomes available to book in the future? I've tried waiting previously in the same scenario but when I went to book the return the original departure I wanted it was no longer available so I wasn't able to book. I'm hoping to avoid this situation this time around and was curious if anyone has done anything like this previously? TIA!