I have about 35k AAdvantage miles with American Airlines that are about to expire. I understand that if I fly with American this will reset the clock for another 18 months. (Alternately I could spend money to save the points)
But what I am not clear on is do I need to fly before the points expire, or simply book a paying flight with American?
I had intended on using the miles to purchase a trip in 2019, but the number of miles exceeded my balance, and the cost to buy miles to make up the difference was actually more that just buying the flights outright.
In order to keep my miles I used the AAdvantage shopping site to make an online purchase at a partner company that would credit me with a minimal amount of mils (and boy was it hard to decide on a purchase just for the sake of a purchase)
I completed this transaction before the expiration date of my miles. However an email from AA advised me that it could take 3 to 5 days for the points to be credited. This would put the credit after the expiration date.
The day after the points were due to expire they were still there, so I thought I was good. But now they have disappeared, so I am about to have an nice discussion with AA about pending transactions getting the points back.