[QUOTE=shihyin;32622708]Decided to try that myself. Ordered a free flight cert and return immediately. Indeed all the points now have Dec 2022 expiration date. The return timeline can be found on the return award page after you made an award:

Thank you for the tip. I had 1,000 points expiring in 3 months and I redeemed for a BXP1 upgrade for 650 points. I then returned it and it moved the expiration to 2022. I then did it again and that pushed the remaining points into 2022. So now all my points expire 2022. It was so easy since you can redeem and return online. Took 2 minutes total.