An adult is?

• A. A passenger who has reached their 13th birthday
• B. A passenger who has reached their 18th birthday
• C. A passenger who is traveling with a child
• D. A passenger who pays the adult fare

Answer: (A)

Understanding how airlines classify passengers by age helps explain why this answer is correct. For pricing and seating rules, airlines often define an adult by a specific age threshold. In this case, the threshold is the 13th birthday, so anyone who has turned 13 is considered an adult. That means a traveler who is 13 or older falls into the adult category, while younger travelers fall into other categories (like child or infant) depending on the airline’s policy. The fact that someone is traveling with a child or paying an adult fare relates to the pricing or seating outcome, not the definition of what constitutes an adult. So the best description is a passenger who has reached their 13th birthday.