Fly from Boston to Johannesburg $518 round-trip, including all taxes. Yes, Johannesburg, as in South Africa. The only catch? This fare includes connections in London and Madrid, but meh, just think of it as a chance to stretch your legs. Similarly low departures available from New York.
*Update: Seats are scarce and seem to have gone up since we began searching. The $621 fare we spotted from New York has quickly jumped to $745. Fares from Boston also slightly higher than earlier this morning, at $530 round-trip, incl. all taxes.