I'm fairly sure I know what the answer will be here, but since I recently stumbled across Apache FlexJS: https://blogs.apache.org/flex/entry/apache_flexjs_0_6_0 I thought I would double-check.
Is there a way to compile Adobe Flex applications into HTML/JavaScript, using the Adobe Flex SDK? I have done some digging and this new development on the Apache Flex project seems to be the only path forward in that respect.
In theory yes, as described on the schema of https://cwiki.apache.org/confluence/display/FLEX/FlexJS : you get the same source code and can compile it into HTML/JS or SWC.
However, in practice you will get issues because the component library is currently very limited in HTML/JS.