Airtran and Spirit sell roomier business class seats for far less than most other airlines.

穿越航空和Spirit航空公司常以低于其他公司很多的价格出售更宽敞的商务舱座位。

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Ethiopian Airlines (" The New Spirit of Africa ") serves 35 African cities outside Ethiopia, up from 22.

埃塞俄比亚航空公司(“非洲新精神”)的业务则从22个城市扩展到了35个。

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With the two companies is in sharp contrast, PAL subsidiary - the spirit of low-cost airlines in Asia, Southeast Asia, airlines are all negative.

与上述两家公司形成鲜明对比的是，PAL的子公司——低成本的亚洲精神航空公司、东南亚航空公司全都是负增长。

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Allegiant joins Spirit Airlines as the second U.S. carrier to implement fees for carry-on luggage.

CNN: Allegiant Air adds carry-on fee

Although it could also pave the way for further expansion by discount airlines such as Spirit Airlines Inc. and Allegiant Travel Co.

WSJ: What an American-US Airways merger means for you

In the US the emergence of low-cost airlines including Southwest and Spirit Airlines has contributed to a phenomenon that most flyers are surprised to discover.

BBC: How airline pricing works