More and more, the average consumer is planning and shopping for affordable vacations online. We have booked our vacations online, and have spent endless hours searching online for the best deals, but while we find booking the trip quite easy, finding the best information and price can be a bit of a challenge. For example, one site lists $800 for a flight, and then you'll find another where the same flight is $400. Why is that? All of the travel websites sell the same flights, cruises, rental cars, and hotel rooms, but all of them attract potential customers by offering different options and certain restrictions in order to differentiate themselves from one another. This means that you can play off the strengths of each travel site as you shop for your romantic vacation or getaway. There are so many travel websites online, we've tried to make the shopping experience as easy as possible by listing some of the best travel sites online that offer affordable prices on hotels, rental cars, and airfare. Where are the best travel deals online?