Delta SkyMiles and Singapore KrisFlyer will terminate their partnership on May 15, 2010. After this date, SkyMiles and KrisFlyer members will no longer be able to earn or burn in the other program. If you take a flight that commences by May 15, you will earn miles for that flight, but if your return date is past May 15, you will not earn miles for the return portion of the flight. Customers may continue to book award tickets through May 15, 2010 for travel until May 14, 2011.