I am trying to book one-way Promo Award from Europe to YUL (via AMS) at the end of February. Although at "select flight" stage I can see flights at Promo Award rates in Y, they dissapear at the next stage (trip overview) and the system says that only Classic awards are available. This is true for all dates I have tried in Y. However, a few days seem to have Promo availability in Business (but not the days I need). However, I have noticed that if I try to book a return flight, the Promo rates are back for the same days that were not available with one-way award. The rules of Promo Awards specifically says that they are available for one-way flights and it is confirmed by the partial availbility in Business, so I am really confused.
Can somebody with more experience advice me what to do in that situation?
Thanks in advance!