Originally Posted by
PHXflier
You need to book a non-refundable hotel, and when you book you will see a note on the booking page whether it qualifies for the Delta AmEx credit. There is no minimum spend. If your hotel is less than the credit that you have for the year, you are able to use the remainder of the credit on other reservations until depleted. You get charged for the full amount, and the credit typically shows up on your account within a day or so.
It doesn't have to be non-refundable. But you do need to select the "Pay Now" option in order to qualify for the Amex statement credit. They will remove credit if you cancel a refundable booking for refund.