Via FrequentMiler, you can fly from US cities like Atlanta, Houston, Detroit, Denver, and more, to European cities including London, Paris, and Madrid, in Business Class from ~$1,795!
I found a Business Class flight from Phoenix to Barcelona leaving May 17, 2017, and returning May 24, 2017, for ~$1,819. And a Business Class ticket departing from New York (JFK) on August 24, 2017, and returning from London on August 31, 2017, for ~$1,887.
This is an amazing deal, because Business Class tickets between the US and Europe can easily cost $4,000+.
These fares are valid for travel through January 2018. On airlines including Delta, American Airlines, and British Airways!
Here are the details. And how to search for deals from your city!