There is no fixed average income for flight attendants because it completely depends on the airline, whether private or public, and the country to which the airline belongs, working hours, type of flight (international or local), years of service, and experience.
Salaries and benefits differ globally, with an average annual salary of approximately $50,000, but also can reach $80,000, while the lowest wage is approximately $26,000.
These numbers are approximate and vary according to many aspects of the business, the country, and the individual's experience.