I followed the advice of some travellers and am looking at the flights on traficoperu.com
the roundtrip for my dates on LAN airlines is $117 Lima to Cuzco and back.
Same quote is for Taca.
There has been lots of discussion of Lan and Taca adding 178USD to the flight ticket which was purchased with a peruvian rate (I think Taca calls it Promo)
Should I simply ignore these rates on Trafico peru, does it mean that they are meant for Peruvian?