Paul K. Frost II, 34, a lawyer and senior associate with Charls E. Walker Associates Inc. here, died Thursday in a Wyoming plane crash. He was on vacation at the time.

The plane, a twin-engine Beechcraft, crashed between Cheyenne and Livingston, Wyo. Killed with Mr. Frost were his nephew, Michael Reynolds Jr., son of the former New York Yankees pitcher.

According to an FAA spokesman, Love reported heavy icing on the plane's wings 30 minutes after takeoff, broadcast a distress call shortly after that, and then crashed. There were no survivors.

Mr. Frost was born in Oklahoma City, and came to Washington in 1966 as an assistant to former senator A.S. (Mike) Monroney (D-Okla.).

He then returned to Oklahoma, and earned a law degree from the University of Oklahoma.He came back to Washington with the FAA, joining the general counsel's office in 1968 and the legislative staff in 1970. He served as a special assiatant for plans and policy from 1972 to 1973.

He later worked in the government relations office of Union Carbide. He joined Walker Associates last month.

Mr. Frost was a member of the Washington Golf and Country Club, the National Democratic Club and the International Club.

He is survived by his wife, Vicki L, of the home in Falls Church; his parents, Mr. and Mrs. Paul K. Frost, and a sister, Marta Reynolds, all of Oklahoma City, and another sister, Shirley Pierson, of Kenwood, Md.

The family suggests that expressions of sympathy may be in the form of contributions to the Paul K. Frost II MemorialFund, University of Oklahoma Foundation, Norman, Okla.