Posting links to previous answers is not intended to discourage questions or further discussion.

You might like to see some links provided in a previous reply by /u/Elm11 :

• "Did paper airplanes exist before the Wright Brothers?" at https://www.reddit.com/r/AskHistorians/comments/4vfpq6/did_paper_airplanes_exist_before_the_wright/, responses by /u/cthulhushrugged and others in the tree
• "Did people make paper airplanes before the airplane was invented?" at https://www.reddit.com/r/AskHistorians/comments/737jy0/did_people_make_paper_airplanes_before_the/, answers by /u/ashkenazeeyankee