Originally Posted by
PaddyOTG
My mammoth rollover of 2018
has posted
For those whose rollover has posted... when was your last flight of 2015?
My theory is that Delta waits X days (let's call it 14) after your last booking of 2015 in order to post rollover mileage to avoid having to adjust mileage. And for those SkyMiles credit card holders, it may be after your account closing date.