The trip will mean the president will miss a few days of campaigning ahead of October's presidential election, in which Macri will hope to turn around the results of last month's PASO primaries and qualify for November's run-off.
Macri is pencilled in to address the UN General Assembly on Tuesday, September 24, but will arrive in New York early to take in meetings with foreign investors and business representatives.
Sources inside the Casa Rosada told Noticias Argentinas that Macri would seek bilateral meetings with Trump and Xi. China has a number of investment projects with Argentina and Beijing will be eager to know what Macri's plans are, should he win re-election.
Talks with the US president, who has a good relationship with Macri, would likely focus on Argentina's economic programme and the International Monetary Fund (IMF), an institution with which Washington holds much sway. Argentina is awaiting the next US$5.4-billion tranche of its record US$56-billion credit line with the Fund.