South Korea's Jeju Air added one aircraft in November and plans to add two more in 2013, allowing it to grow its international network.
Flightglobal's Ascend Online database shows that the low-cost carrier operates 11 Boeing 737-800 aircraft and has five of the type on order.
As part of its international network growth, the airline plans to launch charter services to six cities in China starting December. It has not determined the routes it plans to serve, says a spokeswoman.
The carrier is also eyeing to codeshare with a Thai low-cost carrier and introduce additional services to the country.
"Jeju Air is just considering forming a codesharing partnership with a Bangkok-based low-cost carrier, where both airlines can 'feed' passengers to each other. But the partner airline and new service plan have not been yet determined," adds the spokeswoman.