The people who started the campaign say that the balloon is a means to ensure that Trump "knows that all of Britain is looking down on him and laughing at him".
But it is unlikely the Trumps even saw them.
The US President added that he had told European leaders that immigration is a problem.
Tens of thousands of protesters would disagree.
May will host a black-tie dinner for Trump there, attended by senior ministers and about 100 business leaders, including from Blackstone group, Blackrock, Diageo, McLaren and Arup.
Speaking in Brussels as he wrapped up a contentious North Atlantic Treaty Organisation summit, Trump shrugged off concerns over demonstrations, saying he had "great friendships" in Britain, where his mother was born.
"It's a disastrous and divisive time, and Trump is very much part of that", he said.
Organisers said they will transport the balloon to Scotland overnight, and will now fly it elsewhere on Saturday.
Despite a series of diplomatic spats between Britain and Trump, the British government is hoping for a quick trade deal with the United States after it leaves the European Union.
Month After Summit, Trump Tweets "Very Nice" Letter From Kim Jong
But Pompeo gave a rosier account saying the two sides had substantive discussions on next steps toward denuclearisation. Recent evidence actually suggests that the rogue nation continues to build up their nuclear infrastructure.
George Clooney Taken To Hospital After Crash In Sardinia
USA actor George Clooney has been released from an Italian hospital after being involved in a motor accident Tuesday. Clooney, the husband of leading human-rights lawyer Amal Clooney , has a home on the Italian mainland at Lake Como.
Holiday Fire: Evacuations reduced at wildfire in Goleta
The majority of the fire was burning in California, but part of the fire burned in timber-heavy, steep-sloped areas of Oregon. The Holiday fire in Goleta, California, north of Santa Barbara, grew rapidly overnight and is now at a size of 100 acres.
The trip includes meetings with Prime Minister Theresa May, who has described the USA as Britain's strongest ally, and is determined to secure a trade deal after the country acts on Brexit and leaves the European Union in March 2019. "Now, for the benefit of all our people, let us work together to build a more prosperous future", she said.
"Our trade and investment relationship is unrivalled - we are the largest investors in each other's economies and every day a million British people go to work for U.S. companies in the United Kingdom and a million Americans go to work for United Kingdom companies in the U.S.", May said. Reports have indicated that his visit will be met with protests, prompting a warning from the U.S. Embassy in London, which advised Americans in the country to "keep a low profile" in case the demonstrations turn violent.
Tall metal mesh barricades and concrete blocks have been erected around the perimeter of the US Ambassador's swanky central London residence, Winfield House, where Trump will spend Thursday night.
But it was Trump's unnecessary broadsides against immigrants in Britain and Europe that really displayed his bigotry.
More than 60,000 people have signed up to demonstrate in London on Friday when protesters intend to fly a large balloon over parliament portraying Trump as an orange, snarling baby.
The trio will be having tea at Windsor Castle, a meeting that Buckingham Palace described in a press release as a "working visit".
"The people voted to break it up (Britain's ties with the EU)", Trump said.
Khan said past year that Trump's trip to the United Kingdom should be cancelled after the president retweeted videos from a leader of an ultranationalist British party that claims to show Muslims engaging in violent acts.
Instead, what had been an state visit was downgraded to a working visit, which means the Queen does not officially host the president and the first lady as she has done with previous USA presidents.