A timetable was not given due to a multiple layer of sanctions imposed against North Korea.
Mr Trump told reporters aboard Air Force One on his return from the G-20 gathering in Argentina that he thinks the meeting will be in early 2019. He said, "We are getting along very well". Kim also met with President Donald Trump in Singapore in June, when they issued a vague aspirational statement about a nuclear-free Korean Peninsula without describing how or when it would occur.
But while inter-Korean relation-building has continued apace over the past year, talks with the U.S. have stalled.
"The decline is mainly attributable to economic difficulties and stalled denuclearization talks (between the United States and North Korea)", the pollster said.
The Koreas and the USA -led U.N. Command recently finished removing firearms and troops from the jointly controlled area at the border village of Panmunjom, and eventually plan to allow tourists to freely move around there.
Cheong Wa Dae said Moon and Trump met for about 30 minutes in Argentina on Friday and discussed Kim's visit to Seoul as well as sanctions against North Korea.More news: One Marine rescued, 6 missing after planes collide off Japan
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North Korean and South Korean soldiers are pictured during an operation to reconnect a road across the Military Demarcation Line inside the Demilitarised Zone (DMZ) separating the two Koreas (Novemeber 22, 2018).
On November 7, the State Department announced that Secretary of State Mike Pompeo's meeting with Kim Yong Chol, vice chairman of the ruling Workers' Party of Korea Central Committee, which had been scheduled for November 8 in NY, would "take place at a later date".
North Korea has taken few concrete steps to abandon its nuclear and ballistic missile programmes.
The launches - and reports of a test of a hydrogen bomb test in September 2017 - were often accompanied by fiery rhetoric from Kim, prompting Trump to often respond in kind.
The leadership of both countries suggests that by the end of 2018 will be the connection of the railroad of the South and the North. Seoul has allocated about 57 million dollars to fix and upgrade the railway infrastructure of the DPRK.
More recently, "We continue to have conversations about the right next step that is the right substantive next step", toward denuclearization, Pompeo said.
Differences over how to denuclearize the North have kept the 2 countries from deciding the date and venue of the next summit.