The font used in the Avatar The Last Airbender logo is Herculanum. This font was designed by Adrian Frutiger in 1990, and was published by Linotype. There are 6 different styles in total included in the complete font pack. Note: The word "Avatar" in the logo is not a font, but instead is a hand drawn logo (as can be seen by the x2 different variations on the letter A in the logo).
This font is free to use for personal use. If you wish to use it in a commercial project, you must purchase the pro version from the font vendor which includes a commercial license.
However, if you're just looking to use this Herculanum font in one of your local design projects, then you are good to go. If you're a fan of the show and want to create a poster, or a logo for your own personal hobby website, then this is the typeface that you are going to want to use. Click on the green download link below to get your very own copy of the Avatar The Last Airbender font.
Avatar: The Last Airbender is a show that has been praised for successfully fusing American cartoons with Japanese anime, mixing the art and themes of these different styles together to tell the story of its plucky protagonist Aang. The TV show enjoyed high ratings throughout its run from 2005 to 2008 on American kid's channel Nickelodeon, winning five Annie awards and also the prestigious Primetime Emmy award. The franchise has since expanded to include a comic book series, a live-action film, and a direct sequel called The Legend of Korra. The logo itself ties in very well with the overall them of the tv show. The font that's used in the logo combines swishes and Asian accents which complement each other perfectly.