I rarely post trailers to this page, but I think this one is very well done. Up in the Air is the newest directorial effort from director Jason Reitman (Thank You For Smoking, Juno), and Reitman himself cut this teaser together.
The film was the big hit of the Telluride Film Festival, and from the trailer it would appear the praise is warranted. Check it out for yourselves. Slashfilm got this exclusive trailer from Sony, and I've embedded it below.