Flying Blue Expiration Policy
So I have an upcoming booking WAW-IAH that I used 53k FlyingBlue points for. The reservation was made August 19, 2018. If I cancel the reservation today (March 10, 2019) and pay to have the miles deposited back into my account, when will the miles expire? (1 year from today's date?) ... also, to keep the 53k points active, can I just fly a Delta domestic flight within the US and have it credited to my FlyingBlue account to keep the points from expiring and last forever?