Visit Delta's website, go to the SkyMiles drop down menu and click on "Manage my Account." Select "Request Mileage Credit." Enter your SkyMiles number and first 13 digits of your ticket number at the Mileage Credit Request form and hit "Submit." If Delta can't confirm mileage based on the information, you will be prompted to complete the online mileage request form.
Fill out the online mileage request form if confirmation is not achieved in step 1. Your personal information is needed as well as itinerary information. Fill out either the ticket number or flight number, date of flight, and departure and arrival cities.
Mail or fax a copy of your ticket, or ticket receipt, and boarding passes to request mileage credit from Delta partners. As of April 2011, requests for partner mileage credit was mailed to:
Delta Air Lines, Inc.
SkyMiles Service Center
Dept. 654
P.O. Box 20532
Atlanta, GA 30320-2532
or fax: 404-773-1945