Originally Posted by
Villavic
Don't know much about Asunción but flights from there to Iguazu must be short (336km), you should consider this. ^
I don't think there are flights between Asunción and Iguazú. The only access is via land, or connecting flights in Buenos Aires. If you're a U.S. citizen, you'd run into needing a visa for Brazil, so you'd want to access the falls by land via Argentina.