Plane Talk: South America has many rewards, but getting there can be gruelling Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice London and Lima are 6,313 miles apart. Reader Diane Pugh is planning a trip to Peru . She seeks advice on reach this nation of natural and man-