Vast numbers are coming from north Africa/middle east, either from Adriatic route, some across the Mediterranean.
So let's name a few safe countries they might come across on their way
Austria, Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, , Estonia, Finland, France, Germany, Greece, Hungary*, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland*, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden**,Denmark** (Scandinavian**)
*Closed borders do not allow any migrants