The stop is part of Trump’s first Asia trip since returning to the White House in January, which will also include high-stakes trade talks with Chinese President Xi Jinping in South Korea and visits to Malaysia and Japan.

Trump told reporters aboard Air Force One that he hoped for a "very good meeting" with Xi, adding that he expected China to make a deal to avoid further 100 percent tariffs that are due to come into effect on 1 November.

A US Treasury spokesman told AFP that US and Chinese officials in Malaysia concluded a day of "very constructive" trade talks, which are expected to resume on Sunday.

As he left Washington, Trump added to speculation that he could meet Kim for the first time since 2019 while on the Korean peninsula.

"I'm open to it," Trump said aboard the presidential plane. "I had a great relationship with him."

Asked if he was open to North Korea's demand to be recognized as a nuclear state as a precondition for talks, Trump replied: "Well, I think they are sort of a nuclear power... They got a lot of nuclear weapons, I'll say that."

The two leaders last met in Hanoi during Trump's first term. Kim has said he would also be open to meeting the US president if Washington drops its demand that Pyongyang give up its nuclear arsenal.

South Korea's reunification minister has said there is a "considerable" chance that Trump and Kim will meet while the US leader is in South Korea, mainly for a regional summit.

Peace and trade deals

Trump's first stop will be Malaysia, where he arrives on Sunday, for the Association of Southeast Asian Nations (ASEAN) summit -- a meeting he skipped several times in his first term.

Trump is set to sign a trade deal with Malaysia, and will witness the signing of a peace accord between Thailand and Cambodia in his continued quest for a Nobel Peace Prize.

He said he also expected to meet Brazilian President Luiz Inacio Lula da Silva on the sidelines of the summit to improve ties with the leftist leader after months of bad blood.

Trump's next destination will be Tokyo, where he arrives on Monday. He will meet conservative Sanae Takaichi on Tuesday after she was named this week as Japan's first woman prime minister.

The US leader said he had "heard great things about her" and hailed the fact that she was an acolyte of assassinated former premier Shinzo Abe, with whom he had close ties.

Japan has escaped the worst of the tariffs Trump slapped on countries around the world to end what he calls unfair trade balances that are "ripping off the United States."

Trump and Xi

The highlight of the trip is expected to be South Korea, with Trump due to land in the southern port city of Busan on Wednesday ahead of the Asia-Pacific Economic Cooperation (APEC) summit.

Trump will meet South Korean President Lee Jae Myung, address an APEC lunch with business leaders and meet US tech bosses for dinner on the sidelines of the summit in the city of Gyeongju.

He will meet Xi on Thursday for the first time since his return to office.

Global markets will be watching closely to see if they can halt the trade war sparked by Trump's sweeping tariffs, especially after a recent dispute over Beijing's rare-earth curbs.

Trump initially threatened to cancel the meeting and announced the fresh 100 percent tariffs during that row, before saying he would go ahead after all.

He said he would also discuss fentanyl with Xi, as he raises pressure on Beijing to curb trafficking of the powerful opioid and cracks down on Latin American drug cartels.