Top fliers, from Business Traveler magazine's Best in Business Travel Awards for 2006:
Airport, world: Singapore Changi.
Airport, U.S.: Denver International.
Flight attendants, world: Asiana.
Flight attendants, U.S.: Continental.
Overall airline, world: Singapore Airlines.
First class, world: Emirates.
Business class, world: Virgin.
Economy class, world: Singapore Airlines.
Low-cost carrier: Frontier.
Frequent-flier program: Delta.
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