Delta Air Lines said it received final...

Delta Air Lines said it received final approval from the South Korean government for service from Atlanta to Seoul. The carrier plans three round-trip flights a week beginning Dec. 15 . . . Chrysler Corp. Chairman Lee Iacocca has been granted a divorce in Pontiac, Mich., from his 37-year-old wife of 18 months . . . Chalco Industries of Gardena, an aerospace and electronic firm, will buy privately held Downey-based Olympic Fastening System, paying for the acquisition with 2,453,712 new common shares. Chalco posted sales of $5.25 million in fiscal 1987 and lost $114,000 . . . Toronto Sun Publishing Co. has completed its sale of the Houston Post to MediaNews Group of Dallas for $100 million in cash plus a $50-million five-year note.