Online Travel Agencies, Travel Suppliers, Destination Representatives, Governments and Marketers. The Online Travel Marketing and Selling spotlight report examines the broad worldwide impact of the online travel market, unquestionably the single largest online commerce segment. Along with Forrester Research and PhoCusWright, predicts that US leisure and unmanaged travel bookings will reach roughly $50 billion in 2004, a figure nearly four times the next largest e-commerce segment. Estimates that Online Travel constitutes approximately 40% of total US B2C e-commerce sales. All sections of the travel market will see strong growth over the next five years. Vacation package and cruise sales will more than triple between 2004 and 2009, but will remain relatively small niches nonetheless, accounting for a fraction of the revenues generated by the Big Two: airline tickets and hotel rooms.