In December of 1915, Jack and Charmian took their last trip to Hawaii, when they departed San Francisco on the SS Matsonia.
The SS Matsonia was a Matson Navigation Company liner, launched at Newport News Shipbuilding in 1913 and sailed between Hawaii and San Francisco until 1918 when she was requisitioned by the US Navy as a transport. At the end of WWI, she resumed service with Matson until she was sold in 1937 to the Alaska Packers Association and renamed SS Etolin. Then she was chartered by the US Army as the troopship USAT Etolin in 1940, until she was retired after the war. She was in mothballs until 1957 when she was scrapped.