Second London Naval Treaty
Repaired and returned to service with the fleet, "S-19" continued her Atlantic operations until 22 October 1930, when she departed New London for the Pacific Ocean. The submarine arrived at Pearl Harbor on 7 December, and for the next three years operated out of Hawaii. She was decommissioned at Pearl Harbor on 10 February 1934, was struck from the Naval Vessel Register on 12 December 1936 and was towed to sea and sunk on 18 December 1938, in accordance with the terms of the Second London Naval Treaty.