The event took place last week. A United States Defence Department agency recovered the remains and returned them to the US.
The Embassy says the brief ceremony "paid tribute to the valour of those lost and underlined how their sacrifice reinforced the enduring tie between the people of the United States and Papua New Guinea".
US ambassador Catherine Ebert-Gray, representatives from foreign diplomatic missions, and members of the PNG Defence Force participated in the event at the VIP Terminal (APEC Lounge) of Jacksons International Airport on June 10.
The Embassy says the ceremony follows a successful investigation and recovery mission on Kovu village, Gulf province, and a series of missions carried throughout the course of the year on East Sepik, Morobe, and Northern (Oro) province.
"The US remains committed to achieving the fullest possible accounting of Americans lost during the Second World War."