[11/28/2018 @ 5:35 PM] Fare gone. Removing from deal list.
Delta and SkyTeam partners have round-trip flights from Chicago (ORD) to Athens, Prague, Istanbul, Budapest, or Warsaw (ATH / PRG / IST / BUD / WAW) starting at $516 with a connection. Flights from January to mid-May. Flight may operate as a SkyTeam code-share. Expect prices to fluctuate by +/- $30.
Note: Fares seem to be “Regular Economy”, not “Basic” at the time this post was written.