My dines will post in my i-dine statement usually 3 days after the dine. They are in "pending" status. On the following Tuesday, they are deposited into AA.

For example, I had a dine on Wednesday this week. They showed up in i-dine today. I expect to see the miles in AA on Tuesday.

So posting time will vary based on the date of your dine.

Interestingly, on Tuesdays, the miles still show as "pending" in your i-dine account, but they are deposited in AA at this point. I-dine will show as "paid" on Wednesday morning.