bikini-clad flight attendant, Low-cost airline. 比基尼泳裝空服, 廉價航空

Low-cost airline VietJet has soared ahead of its competition – after using bikini-clad flight attendants to capture the world’s attention six years ago. The budget Vietnamese carrier’s market capitalisation took over its main rival, Vietnam Airlines, for the first time on Monday, March 6, 2017, just a week after the company was listed. (Photo by VietJet Air)
The Day in Photos – March 7, 2017
http://avax.news/fact/The_Day_in_Photos_March_7_2017.html

Flight attendant - Wikipedia

Flight attendants or cabin crew (also known as stewards/stewardesses, air hosts/hostesses, cabin attendants)

空中服務員 - 维基百科

空中服務員（又稱空乘、空服；女性稱空中小姐、空姐、空嫂；男性稱空中少爺、空少、空叔）

Low-cost carrier - Wikipedia

 low-cost carrier or low-cost airline

低成本航空公司- 维基百科，自由的百科全书

中文亦稱為廉價航空公司（或低價航空公司），簡稱廉航