Complex sentence: Cathay Pacific and Korean Air was the first two airlines to move to the new terminal on 31 October 2017, followed by Cebu Pacific and Spring Airlines on 2 November 2017 and the AirAsia Group and Vietnam Airlines on 7 November 2017.
Split into simpler sentences: Cathay Pacific and Korean Air will be the first two airlines to move to the new terminal on 31 October 2017. They will be followed by Cebu Pacific and Spring Airlines on 2 November 2017.