Denver International Airport plays hosts to dozens of airlines. None occupies nearly so many gates as United Continental (UAL 2.83%), but among investors, it's United's Star Alliance partner, Deutsche Lufthansa (DLAK.Y 2.62%), they love best. The company gets the maximum five-star rating from the 32 investors to rate the stock in Motley Fool CAPS.

Is the enthusiasm warranted? Certainly. Debt, which accounts for 45% of total capital, isn't the same concern for Lufthansa as it is for United Continental (87% of total capital) or most other U.S. carriers. What's more, the airline has recently made smart labor-relations moves and is finding ways to expand while cutting costs. Find out more in the following video.