October – December
3 October – United States President Richard Nixon arrives in Ireland. He is greeted by Taoiseach Jack Lynch. In Dublin an anti-Vietnam War protest takes place.
4 October – Mrs Nixon visits relatives and her ancestral home in County Mayo. Another protest takes place outside the U.S. Embassy in Dublin.
13 October – Jim Lovell, Jack Swigert, and Fred Haise, survivors of the aborted Apollo 13 spaceflight to the moon, land safely at Dublin Airport with wives Marilyn Lovell and Patt Haise.
23 October – Charles Haughey, James Kelly, Albert Luykx and John Kelly are acquitted in the Arms Conspiracy Trial.
26 October – Taoiseach Jack Lynch, questioned on his return from the United States, says that there will be no change in fundamental Fianna Fáil policy regarding Northern Ireland.
15 December – Aer Lingus takes delivery of its first Boeing 747 Jumbo Jet, the largest aircraft it will ever operate.