NEW YORK, NY--(Marketwired - Jun 27, 2014) - Passport Premiere has detected widespread international business class discount fares for summer travel. Air France, American Airlines, Cathay Pacific, Delta Airlines, Emirates, Lufthansa and Swiss have all initiated fare corrections of up to 65% for summer travel. Fare corrections occur when carriers overestimate the true value of their premium class seats and slash fares to avoid empty premium class cabins.