THE AIR travel bargain of the year is to be found in Peru. The airline Faucett Peruvian is offering 90 days of unlimited travel within Peru for pounds 170 - less than pounds 2 a day. The air pass is sold in the UK through Journey Latin America (081-747 3108), which can also offer a round-trip to the Peruvian capital, Lima, for pounds 492 from London on the Colombian carrier Avianca.