Kayak and Expedia had better watch out – booking flights online just got a whole lot easier thanks to an excellent new tool from those geniuses at Google – the new Flight Search, a super-intuitive tool that is set to wrestle a huge share of the market from traditional flight finder services.

Since the acquisition of ITA Software earlier this year, Google have been working hard to come up with the ultimate flight finder software that’s not only dead easy to use, but also throws up the best results according to both ticket price and travel time. Designed with passenger ease in mind, users can access Flight Search either directly or by simply using regular Google search to type their desired flight (e.g. New York to L.A.) and then clicking on the “Flights” link that appears on the left.

With most people having Google as their default home page when they open their web browsers, finding flights is now just a matter of seconds for most internet users – meaning rivals such as Expedia will have plenty to worry about.

Flight Search will bring up dozens of results in seconds. The default setting selects the best available flights, balancing both the cost and the time factor, although users can easily filter results according to flight times, cost and airline, if they so desire. In addition, Flight Search also allows users to compare prices across different dates by quickly flicking through different days or clicking on the calendar icon, which pulls up a nice little graph showing the lowest fares over a 60 day period.

One final great feature is the destination finder tool, which allows users to view all the different destinations within say, 3 hours of New York, for under $500.

Currently, Flight Search is only available for a limited number of cities in the US, and it only lists economy flights, giving Expedia some breathing space, for now…  Google are working hard to expand Flight Search though, so it won’t be long until Flight Search is a serious competitor for online flight bookings.

While you wait, you can enjoy this quick demonstration courtesy of Google themselves: