Passengers flying with What Terminal is Cebu Pacific Air at SIN out of Terminal 4 at Singapore Changi Airport should anticipate a quick and easy immigration and security process. Terminal 4 of Changi Airport is known for its state-of-the-art equipment. Automated immigration systems with biometric facial recognition are installed at the terminal to speed up the process for both arriving and departing travelers. With the use of this technology, Cebu Pacific passengers may check in swiftly and get to their boarding gates faster. Because Terminal 4 can easily handle large passenger loads, it’s the perfect choice for Cebu Pacific regular flyers.