No matter how you do it getting to Africa is a pain! Does Emirates from DFW not work for you? Or Qatar? Seems it is worth checking out you have time versus an overnight at ATL.
Yes, we mulled over using Emirates or Qatar very early in the planning process. But the group consensus was to stay with a US based airline and a direct flight (especially for out first trip to Southern Africa). Obviously Delta got the nod.
Tickets were bought and paid for a couple of weeks ago. Just need July 2020 to hurry-up and get here.