For the second weekend in a row, a Soviet Aeroflot jet defied instructions yesterday and landed at New York's Kennedy Airport before flying on to Washington.

The State Department was "miffed" and meetings were planned today with Soviet Embassy officials to reach an understanding so there is no repetition, a department spokesman said.

The Soviet flight landed at 3:13 p.m. and was ordered to taxi to a remote security area said Ed Franzetti, a spokesman for the Port Authority, operators of Kennedy. About 1 1/2 hours later, the plane took off and landed at Washington's Dulles Airport at 5:43 p.m. There, the passengers cleared customs and left for their destinations, a Federal Aviation Administration official said.

The authority had not been told that any organization had agreed to service the flight, one of two regularly scheduled to the United States each week, Franzetti said.Kennedy ground crews and baggage handlers have refused to service Aeroflot in protest of the Soviet invasion of Afghanistan.

The Port Authority said the flights carried 134 passengers and 11 crew. It said 122 of the passengers were bound for the Winter Olympics, which begin Tuesday in Lake Placid, N.Y.

Last week, a similar unauthorized flight was grounded at Kennedy for 28 hours after the airline ignored recommendations to bypass Kennedy and land at Dulles.

Officials at Kennedy said they thought both Soviet flights would land at Dulles this week. About two hours before arrival today, Aeroflot notified Kennedy the flight intended to land in New York.

David Passage, a State Department spokesman in Washington, said the FAA warned the department a few hours before the plane landed that the Soviets had changed their mind and wanted to go into Kennedy instead of Dulles.