Who has the final responsibility to decide if a customer should be removed from a flight?

The captain holds the final responsibility for deciding whether a customer should be removed from a flight. This authority stems from the captain's overarching role in ensuring the safety and security of all passengers and crew members on board. The captain is trained to assess situations involving disruptive or potentially dangerous behavior and has the ultimate legal authority to make decisions regarding passenger removal to maintain safety and order.

Other personnel, such as flight attendants and ground crew, play vital roles in assessing situations and reporting to the captain, but they do not have the same level of authority to make the final decision, as it's the captain who is ultimately responsible for the aircraft and its operation during flight. While co-pilots assist the captain, it is the captain who has the conclusive say on matters like passenger removal during a flight.