Sometimes airlines publish error fares; these are substantially cheaper flight fares than usual caused by several reasons. The main reason is usually a technological problem with the airline pricing system or human error. Other times the error occurs when a currency conversion goes awry. Whatever the reason is, the bottom line is that you could potentially save hundreds off your flight by booking these fares. Travelradar.com ‘s cheap flight finder can uncover these fares quickly through a broad, ‘everywhere’ search. Bear in mind sometimes very cheap fares may not be errors but just a great and legitimate deal.