If you don't use a ticket in its entirety like hidden city ticketing,  or allegedley "UNDERSELL IT" , you're better off NOT paying for it and waiting for the bill to come in months later... “THE BOSSES” father may have summarized it best: “It’s a sinking ship. No need to put good money after bad. But if the cow still has milk to give, go ahead and milk it” Please don’t feel bad for any airline, for only receiving $1,000 for the business class seat rather than their initial $6,000 asking price. Remember, a seat is only worth what a traveler is willing to pay, If the seat was worth $6,000, someone else would have bought it first.