Asked by the Today show on the US NBC network if it was harder to govern New Zealand or take her daughter on a 17-hour flight, Ardern responded with a laugh and said "It felt at the time on par" and said she had apologised to her fellow passengers in advance. But Ardern seems to be handling it all like the legend she is.
Ms Ardern played with daughter Neve Te Aroha on Monday, shortly before addressing the UN's General Assembly. "Great yarn for her 21st", he wrote. "There's not many places you can do that", Ardern told a Social Good Summit in NY on Sunday.
She became the first New Zealand prime minister to give birth whilst in office, and the second ever elected head of government to do so, after the late Pakistani prime minister Benazir Bhutto had her first daughter, Bakhtawar, in 1990.
The premier was photographed kissing and bouncing up and down daughter Neve in the main assembly hall next to partner Clarke Gayford, at a plenary meeting known as the Nelson Mandela Peace Summit, which she also addressed. "I'm not the first woman to work and have a baby", Ardern told skeptics shortly after announcing her pregnancy.
Gayford took to Twitter to share details about his and little Neve's first time at the United Nations, including a photo of the "first baby" ID.
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"There is no spousal programme for this, so we just made a judgement call that we would cover his travel for this trip".
Ms Ardern is among world leaders at the UN General Assembly this week and has Neve, born in June, in tow.
"Prime Minister Ardern is showing that no one is better qualified to represent her county than a working mother", he said. So next time you feel sheepish about having to leave work early to pick up a sick child, ask yourself: "what would Jacinda do?" the piece concluded.
"Unless there is a culture that accepts that mothers and children are part of our workplaces, then we won't change anything".
When the event moderator remarked that the baby was backstage and very peaceful, Ardern quipped: "Wasn't at 3:30 this morning".