Remember the days when you had to call a travel agent or dial a host of toll free numbers on your own to comparison shop for flights and hotels? Those days are long gone. Personal online travel planning is now the second largest e-commerce moneymaker, trailing only the adult entertainment industry. 

Last year Americans spent some $103 billion online on leisure and small business travel, and, according to Hudson Crossing, a travel consulting company, that figure is set to rise to over $110 billion next year as the economy continues to recover.

Most of us are now our own travel agents, and there are scores of websites out there to help us do the job that professionals once dominated. We took five travel websites that are creating a buzz in the travel industry and put them to the test.  All of them can help you make more informed airline ticket purchases on the Internet, but each have unique ways to book a flight that go beyond simply entering in your destination and dates.