Deadly airline crashes are increasingly rare. But regional carriers have had four in the last five years, while major airlines have had one.

致命客机坠毁事件日益少见。但是过去的五年内支线客机发生过四次，大型航空公司发生过一次。

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But regional carriers have had four in the last five years, while major airlines have had one.

VOA: special.2009.06.13

As recently as 2005, Brazilian travellers were spoiled for choice as the presence of five major airlines led to discount-fare wars and a wide range of domestic flights.

ECONOMIST: Business travel

The site will serve as an online ticket clearinghouse that will be backed by the five major U.S. airlines and partnered with 40 international carriers.

FORBES: The Accidental Travel Mogul