To change the last name on your ticket, visit the Delta website and select the "Manage My Booking" option, or contact customer support or an ✅✅ +1 805 307 0160 (OTA) or +1 845 658 4259 (OTA). For legal name changes, you may need to provide supporting documentation, such as a marriage certificate.

https://solucoes.microsoftcrmportals.com/forums/general-discussion/28f3e299-3f54-ef11-b4ac-6045bd39b5a8
How can I communicate with Delta?
You can message Delta directly for all of your travel needs. To speak with a representative about a new or existing reservation, call 833-730-7587. If you are a Medallion® Member, check the Contact Us section in the Fly Delta mobile app for your dedicated phone line.
How can I speak to a Delta representative fast?
To talk to a Delta live representative in a quick time, you can initiate a request in several ways. You can call their customer dedicated service line at +1 805 307 0160 ✈ +1 845 658 4259)(No Wait Time),” start a chat, email user, and engage on social media.

https://solucoes.microsoftcrmportals.com/forums/general-discussion/28f3e299-3f54-ef11-b4ac-6045bd39b5a8
How can I speak to Delta immediately?
To speak with a representative about a new or existing reservation, call 833-730-7587. If you are a Medallion® Member, check the Contact Us section in the Fly Delta mobile app for your dedicated phone line.
How to change my Name on a Delta Business class ticket
Yes, you can change the Name on your Delta Airlines ticket by visiting their website or contacting customer service +1 805 307 0160 (OTA) or +1 845 658 4259 (OTA). Be aware that fees and fare differences may apply.