Airline is international business, so most airlines have their attendants wearing Westerm-style uniforms, like shirt and a skirt for women, shirt, tie and trousers for man.
But some Asian airlines have their flight attendants wearing non-Western style uniforms, like 'Cheong Sam' (a long Chinese dress with narrow cutting) for China Airlines of Taiwan, dress with beautiful pattern and wide neck for Thai Air and Singapore Airlines. These flight attendent nuniforms are even the symbol of the airline, as displayed in the travel agencies.
Lauda Air of Austria has its flight attendants wearing Diesel jeans instead of skirt for women and trousers for men, and is unique in the world.
Most airlines have their women flight attendants wearing longer skitrs, no shorter than knee level normally. But Southwest Airlines have its women flight attendants wearing very short skirts, and in leather coat, again unique in the world