If you can reserve your flight with 50 days advance notice, and stay between 7 and 30 days at your destination, Delta has some international business class deals for you. Clearly, these fares are not meant for last minute business trips, but rather for leisure travelers who prefer to fly in comfort at a reduced rate.
But do read the fine print: " Fares are nonrefundable. Delta may permit you to apply a portion of the fare value to future travel upon payment of applicable fees and fare difference, otherwise the ticket will have no value. Fees may apply for itinerary changes."