In a preliminary analysis, NBTA predicted that published airfares next year would increase by between 6 percent and 10 percent, and "corporate discounted airfares" would rise between 3 percent and 5 percent. Among 196 travel manager respondents to an NBTA survey, 60 percent said they expected their companies' travelers to make more trips in 2008, compared with this year.

Based on analysis from the CWT Solutions Group, Carlson Wagonlit Travel for 2008 anticipates domestic published fares to increase 4 percent to 7 percent. An expected double-digit jump in published international fares would follow the 15 percent to 20 percent hike in international business class airfares that CWT observed this year versus 2006.

BCD Travel's forecast, developed in conjunction with its consulting arm Advito, includes more modest air travel cost increases, with worldwide published airfares rising 2 percent to 4 percent, below the 6 percent to 10 percent BCD had anticipated for 2007. Corporations in particular would face even smaller price hikes of 2 percent or less--down from the 5 percent to 7 percent range expected this year--as airlines provide deeper corporate discounts for those clients able to shift share, according to the forecast.

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