I just transferred my Avion (RBC) points over to BA miles (End of January they give 1.5x your Avion points) as I do every year and now you got me worried I need to book my trip a year and a half in advance? I've not heard of this issue until now. I know last year the fiance's mother sent her son to Europe on her Avion/BA miles and they booked a month before he left, no problems. I wonder if it was through Avion that made the difference? Hmmm, now I need to investigate