Google made its first formal foray into that segment last July with the $700 million purchase of ITA, developer of the airfare search and pricing system QPX that is used by major airlines and more recently, Google made further inroads into the travel category  with the quiet launch of Flight Search, a web-based tool that lets you find and book flights.

Flight Search is a more user friendly version of a service Google launched in May. It offered flight info when you typed “flights from [a city] to [another city]” in the Google search window.

A video below explains the service further: