For a research project I want to try Easyjet, Ryanair, Vueling and Germanwings. I want to do all of that in one day, leaving from Paris ORY or Paris CDG, and returning to either Paris ORY or Paris CDG on the same day. Some time in the first week of September.
So, all timetable experts out there, which routing would I need to fly? Using one airline twice would not be a problem, but I want to use each one at least once.
I would online check-in for all flights the day before and travel only with a small handbag/backpack, so no need to pass by check-in counters. Optimally I'd change airlines within the same terminal so I don't even have to go through security. Smaller airports are better, less delay-prone.