Singapore Airlines will be the main user of the new terminal but will also continue operating from T2.
The Civil Aviation Authority of Singapore (CAAS) has invited other airlines to operate from T3 to optimise capacity and balance traffic demands.
CAAS will work with airlines, airport agencies, ground handlers and business partners to set-up their operations before the opening and test critical airport systems such as flight information, baggage handling, people movers and passenger check-in systems.
Trial flights will also be conducted to test airport processes and CAAS plans to hold terminal familiarisation sessions for airport staff and ground transport operators.
T3 and its associated works cost US$1.14 billion. It will have a handling capacity of 22 million passengers a year.
Located directly opposite Terminal 2, the new terminal will have more than 100 retail shops, 30 F&B outlets and 20 service concessions.
Special features include natural lighting, landscaping, water features and new retail design concepts.
The minister for transport, Raymond Lim, said: “One year ago, we crossed a major milestone in this project by completing the construction of the main building’s structure.
“When Terminal 3 opens its doors in 2008, it will bring us closer to our vision of making Changi a regional air hub.”