Tailor your high school studies for a career in the travel and hospitality industry. You should take a college prep curriculum, because college is usually required to become a stewardess. Take several years of a foreign language as well.
Earn at least an associate's degree in college. Your most useful courses will be in a foreign language. If you choose to complete a bachelor's degree, major in hospitality management with a minor in a foreign language or vice-versa.
Get customer service experience. The easiest way to do this is through a part-time job while you are in school. Working in the customer service department of almost any company is ideal, but this can also include cashiering or even waiting tables in a restaurant.
Start your job search. You will need to monitor newspapers and other job listings and the "Careers" pages on airline websites. In addition, airlines sometimes sponsor recruiting events in different cities, so be on the lookout for these as well. Be ready to relocate, because the odds are that will be a requirement.
Attend the airline's flight training school. Depending on the airline, this can last from 4 to 7 weeks. The training is intensive and includes emergency procedures, first aid, how to cope with everything from an unruly passenger to a hijacking situation, and water survival training. You will also learn airline rules and policies, how to handle passports and other regulatory issues. Once you've graduated, expect to work nights, weekends, and holidays.