"People are finding it more and more frustrating to get from a to b, not least because the hub-and-spoke system breaks down very quickly," says Mr Riegel.

Riegel说：“人们发现从一个地方到另一个地方越来越令人沮丧了，尤其是因为轴—辐系统经常瘫痪。”

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He also likes electronic-products maker Hubbell Inc. (nyse: HUB.b - news - people ), which reported a 39% gain in first-quarter revenue, as well as 20 consecutive quarters of positive operating cash flow.

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On the other hand, the majors' strengthening of the hub-and-spoke networks (by which travelers go from A to B via a hub in airport C) imply that entry into new markets -- what in the industry is called "city-pairs" -- is relatively simple.

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