Toronto's skyline, in Ontario, Canada.

By Jessica Plautz2015-02-02 20:38:44 UTC

Travel booking websites field millions of searches everywhere in the world, putting them in an ideal position for identifying trends and deals that is, if they can distill all that data into useful tips.

Kayak says it handles more than 1 billion travel booking searches annually, and the company's "Travel Hacker Guide," launched Monday, is an effort to do just that for North American travelers. The "hacks" included in the guide are meant to help people travel smarter.

Kayak ranked the top 10 trending destinations based on year-over-year increases in flight searches. Milan, where the World's Fair will take place this year, came in at No. 1.

KAYAK's new "Travel Hacker" tool provides insights on popular destinations as well as tips for getting the best deals.

A calendar feature displays average airfare, popular hotels and travel tips.

"We've made the data featured in the [guide] highly visual and easy to reference, which we know is ideal for travelers who are hungry for hacks to make trip planning as simple as possible," said David Solomito, North America brand director for Kayak.

The cities rounding out the trending list show the appeal of growing urban destinations.

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10 up-and-coming travel destinations and when to visit