Shenzhen Airlines will launch a twice daily Shenzhen-Bangkok service on 15 July.
It will use Boeing 737-800 aircraft on the route, the carrier says.
In addition, the airline has launched eight new domestic services since 1 July.
It started four times weekly Shenzhen-Yibin and daily Shenzhen-Guiyang services from 1 July. This was followed by daily Xian-Yinchuan and Xian-Taiyuan-Hailar services from 5 July.
The airline also began four times weekly Shenzhen-Guangyuan as well as daily Hohhot-Hailar and Nanchang-Dalian services on 10 July, and a thrice weekly Guangzhou-Hohhot service on 11 July.
Innovata schedules show that Shenzhen Airlines will be the only operator on the Shenzhen-Bangkok route.