Some travel sites have been struggling to keep traffic as more travelers opt to do business directly with hotel and airline Web sites. Marriott is among the companies seeing growth from that trend.

The Bethesda-based hotel chain says its Web site will set a record with nearly $4 billion in online hotel bookings this year. That is double what Marriott's Web site was booking two years ago and represents about 20 percent of the company's total hotel-level gross bookings.

Marriott says the Web site gets about a half million visits a day.

The company is also adapting its Web site to leisure travelers, who tend to have more flexibility in their travel plans than do business travelers. New additions include tools to search not just by city, but by general regions, nearby attractions or specific hotel amenities.

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