On 25 January 2018, Changi Airport welcomed its first new airline for the year to T4 – JC (Cambodia) International Airlines, which commenced a daily service to Phnom Penh. With the launch of this new daily service, capacity on the Singapore-Phnom Penh route has increased by 25% to 38 weekly services offering about 6,400 one-way seats. JC (Cambodia) International Airlines is also the first Cambodia-based carrier to operate scheduled services to Singapore since 2005.

VietJet Air, currently operating at Terminal 3, will shift its operations to T4 from 6 March 2018. Since it launched its first flight from Ho Chi Minh in 2014, the airline has grown steadily, adding a second daily service to Ho Chi Minh and commencing a daily service to Hanoi. The airline’s move to T4 will allow for expansion of its operations at Changi Airport, with the terminal providing the necessary room for growth. It also reduces the need for its passengers to be bussed from remote gates to the terminal.