Unpublished deals are known to be the ideal way to get cheap domestic & International flights. Some travel agencies deal with unpublished deals, and in many cases, these agencies have a strategy to acquire high volume ticket sales. Travel agencies who acquire this technique purchase air tickets in bulk quantities. This provides the travel agency to sell airfare tickets at meager prices and also ultimately results in higher inventory costs, which have low liquidity.
They are up to 20 to 60 percent off the regular price. So if you are with a travel agency, you can take advantage of this opportunity.