春秋航空
Cathay Pacific and Korean Air were the first two airlines to move to T4 on 31 October 2017. They were followed by Cebu Pacific and Spring Airlines on 2 November 2017, together with the AirAsia Group and Vietnam Airlines on 7 November 2017. On 6 March 2018, VietJet Air moved its operations from T3 to T4. In view of the effects of the COVID-19 pandemic, Cathay Pacific temporarily shifted its operations back to Terminal 1.