When you book your flight ticket in a group, Delta Airlines has several terms and conditions for group booking .For groups of 10 or more, Delta group travel program offers flexible, discounted fares . Delta group rates are calculated based on considerations of several important factors such as the number of members in the group, the distance of intended travel, destination type, the season of travel , time and date of travel , get more info about Delta Airlines group rates, benefits, and booking procedure, visit their official website or read the blog from the provided link.