Not sure of DL travel bennies... But, the only DL flight to Asia is from ATL to NRT.

If, DL employees can use Korean Air then you could go to ICN and connect to about anywhere in Asia.

Out of NRT, United flies to BKK, also you can go to HKG and connect to SGN (Ho Chi Minh City, Vietnam) on United. ZED on an Asian carrier might be the better option, if you get them at DL. Good Luck.