This post is a tutorial about how to embed fonts in Flex. Enjoy it and you may also want to take a look at another text that gives a good base to this topic:
Different languages and fonts
Introduction
With Flex you can create an ActionScript class that serves only as a font repository. You can also set the unicode range choosing which character set you want, this way it isn’t necessary to embed the entire font and the size of the swf decreases.