So why do some airlines have the requirement of Flight Attendant to become good looking, young and single?

Personally they are quite strange requirements to have a Flight Attendant, and quite discriminating. What may be attractive to one might not be attractive to another person. Moreover how's marital status likely to affect how good a air hostess you're?

Answers:

1. - Couldn't agree with you more. I understand how the person must be of a certain size/build due to the nature from the environment they must function in and of course proper hygiene, but personal attractiveness does seem to be a discriminatory area. Also, men seem to excluded from many of these jobs. Is because they aren't applying, or because they aren't being hired?

2. - Some airlines make use of the younger, more appealing flight attendants due to the image they would like to portray. The youth may symbolize energy and who doesn't want to be served by an attractive person? I agree that beauty is incorporated in the eye of the beholder and what one thinks is beautiful may not be beautiful in another person's eye however, many countries don't have laws against age discrimination. I know that in certain countries, a flight attendant is a highly coveted and highly respected position. Lots of people affect become one. Therefore when there are so many applicants, the airline can be more selective on whom they put on their flights.

For marital status, the one thing I can guess is the fact that when you are single, you have fewer obligations. An individual will be married, your priorities change and for those who have children, your priorities will vary as well.

3. - In the developed world, requirements like these are increasingly rare. Within the third world, that is about 40 years behind the times with respect to aviation, this type of abuse is still practiced by some airlines. Eventually these countries will most likely meet up with the 21st century.
Source: http://becomeflightattendant.com