There is a little reassurance for travelers who are unsure whether to buy airline tickets or a vacation package now or take a chance on prices dropping later.

Several online booking sites offer refunds if the price of your ticket or vacation package drops after you buy.

— Book a vacation package by May 31 on Travelocity.com, and if another customer books the same trip for less, you'll automatically get a reimbursement for the difference.

— Priceline offers the same offer for both vacation packages and airline tickets, through June 1.

— Orbitz has no end-date on its Price Assurance offer, which will mail out a refund if another customer buys the same ticket for less.

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If you see a travel offer that looks too good to be true from a company you've never heard of, check its legitimacy and record on the Better Business Bureau's Web site, www.us.bbb.org. Find out the company's record of handling complaints, get its rating and read any customer reviews that have been posted.