Retired Navy Capt. Donald Ehle MacIntosh, 68, a combat air officer in World War II who later became deputy director of the International Aviation Service for the old Federal Aviation Agency, died Tuesday at Fairfax Hospital. He had a heart ailment.

From 1943 to 1946, he served as an air officer aboard the escort carrier USS Santee in the Philippines. Before the war, he had commanded land-based dive-bombing squadrons in the Pacific for six years. He later became an operations officer with the Pacific Fleet's Naval Air forces and served as commodore of Fleet Air Wing II in Jacksonville, Fla.

After World War II, he was a special assistant to the assistant secretary of the Navy for air, and in the mid-1950s, headed the antisubmarine branch for the chief of naval operations. In 1959, he was appointed deputy director of the International Aviation Service for the FAA. He retired in 1963 for medical reasons.

Capt. MacIntosh was born in Pittsfield, Mass. He graduated from the Naval Academy at Annapolis in 1933, and was trained as a pilot in Pensacola, Fla. He also attended the Armed Force Staff College in Virginia and the Naval War College at Newport, R.I.

He lived in McLean and was a member of the Naval Academy Alumni Association.

His military decorations include the Legion of Merit and the Bronze Star.

Survivors include his wife, Betty Stevens MacIntosh, of the home; a son, Donald J., of Vienna, a stepson, Steven W. Darling, of Warwick, R.I.; two daughters, Patricia M., of Imperial Beach, Calif., and Carol A. Brown, of Jacksonville, Fla.; two stepdaughter, Sandra M. Ziegler, of Coronado, Calif., and Patricia A. Dean, of Takoma Park, and 11 grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Capt. Donald Ehle MacIntosh Memorial Fund, U.S. Naval Academy Foundation in Annapolis.