Does Delta Airlines do group booking?

Yes, indeed, Delta Airlines do group booking. However, travelers have to fulfill the minimum number of passengers, which is to reserve a flight for more than 9 flyers, to enjoy the benefits of  Delta Airlines Group Travel services. Moreover, the ticket booking process for group travel is quite simple. Flyers can reserve a flight for multiple passengers flying together by visiting the official website of Delta or by contacting its group desk over the phone. To avail more details related to group travel service, check out the blog at the cited link by the Group Travel Airlines.