Croatia normally play in zargreb but i think also play games in another city from time to time, Hungary always play in Budapest and are currently building a new national stadium but not sure if this will be open in time for Wales game. We got flights to Budapest from Heathrow £86 return a few days ago and there wasn't many seats left on the flights we looked at. Zargreb and budapest are only 200 miles apart so i wouldn't be surprised if theres organised trips flying into zargreb and out of Budapest
We are looking to do Slovakia in september as well