Buy the ticket from U.S. to one Europe gateway city (pick the one have many choices to where you ultimate want to go). Then buy a 2nd ticket from the European low cost carrier.
If you insist to buy a multi-cities ticket originating from U.S. - then either you are very rich or very stupid. Sorry.
If you insist to buy a multi-cities ticket originating from U.S. - then either you are very rich or very stupid. Sorry.