"We sail for Europe tomorrow morning!" the 16-year-old activist said after securing a ride across the Atlantic.
The European country offered to host the U.N. conference in Madrid after Chile abruptly pulled out amid fiery protests this week.
If political instability is throwing off United Nations climate talks now, what will the next few decades look like?
The council is responsible for protecting human rights, which Venezuelan President Nicolas Maduro is accused of violating.
The "Aquaman" star spoke "straight from the heart" on behalf of small island nations under threat from rising sea levels.
Actor Olivia Munn and women victimized by gymnastics doctor Larry Nassar also spoke about sexual violence during the United Nations General Assembly.
His speech at the U.N. General Assembly came shortly after U.S. Secretary of State Mike Pompeo announced new U.S. sanctions targeting Iran’s ability to sell its oil.
Ukrainian President Volodymyr Zelensky said “nobody pushed” during his phone call with President Trump in which Trump asked him to investigate Vice President Joe Biden.
Hundreds of millions of people in coastal areas would be threatened if climate change continues unabated, the UN's climate body warned.
The delegate later blasted Trump as "xenophobic and imperialist" after he called Venezuela's president a "Cuban puppet."
The president mocked the teen activist on Monday: “She seems like a very happy young girl looking forward to a bright and wonderful future.”
The Brazilian president delivered a fiery nationalist speech at a U.N. General Assembly focused on the climate crisis.
The president confirmed to reporters at the United Nations that he froze millions of dollars in aid and called for other European nations to "put up money."
The president responded to the 16-year-old's emotional speech at the United Nations Climate Action Summit, appearing to mock her on Twitter.
President Donald Trump thanked evangelical supporter Franklin Graham, who has called Islam "evil."
"You have stolen my dreams and my childhood with your empty words," the 16-year-old told the United Nations gathering.
A centerpiece of this year's U.N. schedule will be a Monday session on climate change that Trump plans to skip.
Iran’s president Hassan Rouhani separately promised to unveil a regional peace plan at this week's upcoming high-level meetings at the United Nations.
Presidents Donald Trump and Jair Bolsonaro have forged a nationalist alliance based on the idea that climate change is a hoax.