The 10 most expensive U.S. destinations for business travelers

Think the shaky economy's taken a toll on business travel? Take a closer look at those expense forms.

Redmond, Wash.-based travel and expense management company Concur recently looked over data from 15 million of its business travel users and found 500 million expensed items that added up to $50 billion in travel spending for last year alone. In the U.S., average spending on business airfare increased 6.6%, while spending on hotel rooms jumped 4.15%. Those categories alone account for nearly 54% of all business spending.