dfont to ttf conversion pretty much describes export between two font types, namely DFONT Mac Data Fort Suitcase and TTF TrueType fonts. Such conversion is certainly doable with various font managers or font editors both for Windows and macOS platforms. Nowadays you can even find some online font converters that allow you to convert dfont to ttf through website.
Open DFONT file Open TTF fileUtility used to generate various types of fonts
A free web service for font conversion
A tool for online conversion of fonts
A font editor
A font editor for Mac