Without date flexibility, your chances for being able to do this for even vaguely reasonable numbers of DL miles (using DL and partner flights) are vanishingly small.

DL serves DXB nonstop. BKK to ATL would require a connection at NRT on DL, possibly also PDX, SEA, LAX, MSP, DTW, JFK to get availability. You could also route to DXB through Europe (CDG, AMS, LHR) and use partners such as CZ or MU through China and LAX for the TPAC return. I'm not sure how DXB-BKK would route on SkyTeam, perhaps with a connection in China or Vietnam?