Expedia.co.uk was established in 1998 in the UK, and is now the leading online travel agent in the UK. Expedia globally, is the largest seller of travel online in the world. Expedia’s award-winning Expert Searching and Pricing (ESP) technology delivers the most comprehensive flight options available online. ESP also allows customers to dynamically build complete trips that combine flights, Expedia® Special Rate Hotels, ground transportation, and destination activities.