FlyerTalk Evangelist
Join Date: Nov 2000
Location: Nashville -Past DL Plat, FO, WN-CP, various hotel programs
Programs: DL-MM, AA, SW w/companion,HiltonDiamond, Hyatt PLat, IHF Plat, Miles and Points Seeker
Posts: 11,073
Just changed some mid April flights to later dates. It appears I can change flights up to 60 days into the future at no charge - shows as available similar to how you book MAX8 schedule type flight changes.
One of the changes I did actually gave me another 380 points back, even though it was pretty cheap to start with.
As said, check the price to book a flight with a change first.