Once upon a time, only millionaires visited Paris for the weekend. These days, anyone with a credit card and Internet access can take off for a three-day jaunt to Europe. They can bid for a cheap hotel room, book a rental car and pinpoint and secure the last window seat left on a commercial flight--all the day before leaving. In comparison, flying the Concorde seems almost archaic. The world is more accessible than ever, and that is good news for travel consumers. But the real success story concerns the Internet companies that make online travel services available to the public. View the slide show of the 13 best travel Web sites. After the dot-com bubble burst five years ago, practically the only Web companies that didn’t vanish were the travel sites. Take Sabre Holdings' (nyse: TSG - news - people ) Travelocity, which was founded in 1996. Travelocity had revenue of $830 million on bookings of $7.4 billion in 2005. What bubble? Last year, 79 million people in the United States use
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