Vacation plans may be falling victim to higher gas prices, rising travel costs and an increasingly uncertain economic outlook, according to Lynn Franco, director of the Conference Board Consumer Research Center.

The latest consumer confidence survey covering 10,000 households across the country shows that consumers' vacation intentions are at a two-year low.

Only 28 percent of the men and 25 percent of the women surveyed plan to research airline rates and availability online over the next three months, compared to 41 percent and 25 percent, respectively in 2004, according to the Conference Board. More men are using the Internet to make travel arrangements, with more consumers going online to research travel options and opportunities than to actually book trips.

Some 19 percent of the men and 15 percent of the women said they will book airline tickets, and 17 percent of the men and 14 percent of the women said they plan to book motels, hotels and other lodging over the next three months.