With experts predicting a busy summer travel season for Europe, Avis Car Rental encourages visitors to book reservations early to ensure vehicle availability and help get a better price.

"Between the ongoing recovery in the U.S. economy and the continued strength of the dollar against the euro, all signs are that this will be a good year to visit the great destinations of Europe," said Larry De Shon, president, International, Avis Budget Group. "We urge our U.S. customers to make their car hire arrangements as early as possible as some locations will sell out on certain dates. Avis has a wide variety of vehicles available in cities and at airports throughout Europe, from Athens to Zurich, and from Hammerfest, Norway near the Arctic Circle to Istanbul on the border of Europe and Asia."

Some of Europe most in-demand locations include the U.K., France, Italy and Turkey.

Avis Preferred loyalty members can take advantage of Avis’ “Three Minute Promise,” where members will receive their vehicle keys within three minutes of arrival. If it takes longer, members will have 30 euros deducted from the rental cost, according to the company.