Top 25 Online Booking Sites in Travel for October 2013

Ed: We're starting a new monthly feature on top trafficked sites in various sectors in travel, using data from SimilarWeb. We have found SimilarWeb's traffic stats to be the most reliable barometer of consumer web activity, easily besting other comparison sites like Quantcast, Compete, Alexa, and others. We are starting this series by first looking at global traffic to the top 25 online booking sites. The usual suspects are there, of course, but the biggest thing you notice is Booking.com is the king of online travel, in all possible ways, and still has a large runway to grow in the United States. Priceline Group's othe