Tianjin Airlines plans to launch a daily Tianjin-Ningbo-Sanya service on 10 December.
It will use Airbus A320 aircraft on the route, says the carrier.
This new service will complement its Tianjin-Wuhan-Sanya service.
The airline also launched daily Xian-Qingyang-Lanzhou and Haikou-Ganzhou-Nanchang services on 19 November.
It uses Embraer 190 aircraft on both routes, says the airline.
Innovata Schedules show that Tianjin Airlines competes with carriers such as Okay Airways on the Tianjin-Ningbo-Sanya route.
Qingyang is located in the eastern Gansu province.