Moon's trip comes after his visit last week to North Korea where he held his third bilateral summit with leader Kim Jong-un.
Moon will explain the outcome of the latest inter-Korean summit before the entire world when he addresses the United Nations General Assembly. However, his U.S. trip may be more aimed at explaining the summit outcome directly to the U.S. president.
"President Moon is set to thoroughly explain the outcome of the third inter-Korean summit (in 2018) that was held under the interest of the entire world," said Nam Gwan-pyo, a senior director from the presidential National Security Office.
Moon "will hold in-depth discussions (with Trump) on ways to break the impasse in North Korea-U.S. talks and to improve North Korea-U.S. relations," Nam told reporters earlier.
The Moon-Trump summit is scheduled to be held Monday.
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