Welcome to FT marctjoefat!

Segments runs are hard from hub cities on a hub and spoke airline. You can try AMS-XXX-CDG-XXX-CDG-XXX-AMS with part of the trip on AF. Find a cheap (short) CDG turn and sandwich it into a cheap AMS-CDG trip. I suggest using one ways to find the cheapest flights you can, noting the booking codes then using ITA to bring them all together into one booking.

Also, as rolltribe suggested you can find a cheap short route, with lots of LCC's and competition and just keep flying it over and over.


Good luck!