Jabarkan Pemasaran dari The Last Airbender dalam bahasa melayu

The teaser trailer for the film was attached to Transformers: Revenge of the Fallen, released in theaters on June 24, 2009. The teaser trailer was also shown exclusively on the June 22, 2009 episode of Entertainment Tonight. The trailer shows Aang airbending in a temple which is being attacked by a multitude of Fire Nation ships. A theatrical trailer was to be released around Christmas 2009, but it was pushed back until February 2010 because not enough visual effects shots were completed. This trailer was attached to the Percy Jackson film released on February 12, 2010. A theatrical trailer was later released on March 25, 2010. It was then attached with How to Train Your Dragon. The last theatrical trailer is attached to Iron Man 2 which was released May 7, 2010.

The first TV spot for the film aired during Super Bowl XLIV on February 7, 2010. It showed parts of the film that were not shown in the teaser trailer and had no diagetic dialogue, but merely narration. On February 10, the theatrical trailer was released online. It shows multiple scenes from the film and is an expanded version of the first TV spot. McDonald's sold Happy Meals to promote the film.

Pada 9 Februari, 2010, Nickelodeon Consumer Products also debuted the upcoming line of toys based on The Last Airbender. It includes various 3 3/4-inch action figures, as well as larger, action-enabled figures, costumes and other props. Among the toys featured in the line were figures based on Aang, Prince Zuko, Sokka, Katara, and a fully ride-able Appa the Sky Bison. "We worked very closely with M. Night, the rest of the Paramount team and our in-house design team, along with our partner Spin-Master, to come up with the right assortment, the right size for these action figures and make sure we had representation of all the nations within the 'Airbender' series," said Nickelodeon's Lourdes Arocho. The Last Airbender action figures are expected to be released in three "waves"; wave one on June 1, wave two near the film's July release date, and wave three near the 2010 holiday season. THQ Studio Australia also developed a video game based on the film. Titled The Last Airbender, it was released on 29 June, 2010 untuk Wii and the Nintendo DS.