What does the term 'thru customer' refer to?

The term 'thru customer' refers to a passenger who remains on the same aircraft for multiple legs of their journey without needing to disembark at intermediate stops. This term is commonly used in airline operations to identify customers who are not switching flights at certain points along the route. Passengers classified as thru customers enjoy the convenience of staying onboard, which simplifies their travel experience by eliminating the need to transfer luggage or navigate through the terminal multiple times. Understanding this concept is important for flight attendants, as it helps them efficiently manage services for these passengers during layovers and ensure a smooth transition for everyone on board.