What are some European cities that are cheap to fly into?

Does not matter where in Europe or when just like to visit before October I live in the United States, flying out of Denver

Public Comments

1. It might help if you mention which country you are from (and even the airport you want to fly from e.g. the deals from London & Manchester are very different) UPDATE - oh then I'm not the right person to help as I don't know the American market well enough to advise (sure I could do the "google" thing but you have probably done this and could get better results knowing more). I thought you might be from Europe looking to fly within Europe Sorry
2. Please try this link http://www.adria-alpe-travel.hr/airfare.html Maybe it helps. Bye Robert