Lodging has pushed past air to become the largest segment of the U.S. travel market at $144 billion, according to a new report from Phocuswright. Lodging revenue increased 8 percent in 2015 following a 9 percent rise the year prior, and is predicted to hit $163.3 billion in 2017, the study shows. As a whole, the U.S. travel market grew 5 percent in 2015 to reach a total of $341 billion, marking the fourth straight year for growth. For more findings, click here.