The passenger flow is one of the solutions that could prove a good flow and provide a good experience for airport passengers. For this purpose, the researchers studied the passenger flow in the airport terminal to determine passenger flow criteria for providing the U-Tapao airport terminal prototype concept. The researchers used passenger flow theories to analyze a movement flow to determine the passenger flow criteria for the prototype criteria and test with U-Tapao. The U-Tapao prototype concept significantly benefits the passenger flow and provides a new experience from a good flow, that is, a direct route, short walking distance, and space with signs to provide better wayfinding orientation. The study’s results provide a good flow criterion of the passenger flow that can adapt to design or develop the airport terminal. Also, it evaluates the movement flow of passenger performance.