American Airlines, United, British Airways, and Finnair have round-trip flights from Chicago (ORD) to Rome (FCO) for $511, NONSTOP. Flights in May and October. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required.
Note: We know that there are cheaper fares with connections on TAP Air Portugal’s basic fare. We’re ignoring those because they end up costing more once you add in bag fees. We’re focusing on NONSTOP flights on full service carriers in this post.