Up in the Air is a 2009 American comedy-drama film directed by Jason Reitman and co-written by Reitman and Sheldon Turner. It is a film adaptation of the 2001 novel of the same name, written by Walter Kirn. The story is about a corporate downsizer played by George Clooney and his travels. The film follows his isolated life and philosophies along with the people he meets along the way. Filming was primarily in St. Louis, Missouri, which substituted for a number of other cities shown in the film. Several scenes were also filmed in Detroit, Michigan, Omaha, Nebraska, Las Vegas, Nevada, and Miami, Florida.

Reitman has heavily promoted Up in the Air with personal appearances during film festivals and other showings, starting with the Telluride Film Festival on September 5, 2009. The Los Angeles premiere was at the Mann Village Theater on Monday, November 30, 2009. Paramount scheduled a limited North American release on December 4, 2009, broadening the release on December 11, 2009 with wide release on December 23, 2009.