Originally Posted by
Leela
Do the "grocery miles" bump up your expiration date?
If so, then you have to spend $500 on groceries to get 250 miles, but if you shop at the affiliated stores anyway it's a easy way to have miles continuously trickle into your account during the year.
Grocery Miles? Yes, i believe so
Conventional wisdom is ANY activity in your account bumps the expiration date -- miles added, miles deducted, ....
United's New Mileage Plus expiration policy FAQ states
"miles will expire after 18 months of no activity on your account", so the converse is, any activity in your account extends the expiration date