If you are up for this adventure you may take an advantage of current Error fare deal based on TAM Airlines and their partner LAN airlines. For limited travel options in November and December 2015 you may consider to book open jaw tickets to this remote place already for £320 (€434)! This promotional offer is valid for bookings made till 8th of May 2015 but most likely will be fixed anytime soon. To book some affordable hotel room in South America you may compare your accommodation here.
Booking samples
Barcelona - Ushuaia - London for £320
Barcelona - Ushuaia - Munich for €517
Barcelona - Brazil/Paraguay - London/Germany from £246 or €285
To check your connection possibilities we recommend to use Skyscanner. This tool gives you quickly an idea which low-cost airlines are calling Barcelona, Munich or London from your home city.
Booking sample of cheap flights from Europe to South America (and possible error fare air tickets) in this case to Ushuaia in Argentina for £320 here. In this case you would be departing from Barcelona to Ushuaia on 9th of November. Your return flight from Argentina in South America back to London would take place on 23rd of November 2015.