More than 10,000 pounds ($18,400) was raised via a crowdfunding site to get the six-metre inflatable up in the air - smashing the original target of $9,000.
Trump's schedule on Friday includes another meeting and a working lunch with May at Chequers - the prime minister's country house - and a visit to Queen Elizabeth at Windsor Castle, where they'll have tea.
Mass protests and processions are planned all through Friday at various locations in London, expected to attract almost 100,000 people. "I think she represents her country so well", Trump told The Sun newspaper of the UK.
U.S. President Donald Trump said a free trade deal with Britain might be impossible if it went ahead with PM Theresa May's proposals for post-Brexit ties with the European Union, in damaging remarks that could widen domestic criticism of her plans. "I actually told Theresa May how to do it but she didn't agree, she didn't listen to me", Trump said, noting that negotiations had gone on "too long".
In an interview with British tabloid The Sun, Trump said the planned protests made him feel unwelcome, prompting him to avoid the capital.
Trump claimed that London's first Muslim mayor "has done a very bad job on terrorism" and said Khan "has not been very hospitable" to him.
"Take a look at the terrorism that is taking place", Trump said.
"And President Trump has done very many interviews talking about me".
He added elsewhere that Prime Minister Theresa May needs to stand up to Trump.
Waleed Aly isn't impressed with Kylie Jenner's Forbes cover
In another tweet, she stated that if there should be someone celebrated for being "self-made", it should be Jenner's mother, Kris. Even Dictionary.com threw shade onto the cosmetics entrepreneur, and tweeted: "Self-made means having succeeded in life unaided".
London mayor Sadiq Khan has defended the right for a 20-foot "angry baby blimp" depicting president Donald Trump to be flown in Parliament Square during the United States leader's four-day "working visit" to Britain.
He told Sky News: "President Trump has done lots of tweets about me and I have done very few in response".
He added: "I think you are losing your culture".
Khan, who has often been a target of Trump's ire, backed the protests but said those who want to cause trouble are not welcome. Trump said Khan had done "a bad job" on terrorism and crime in the capital.
After arriving on Thursday, he was given an official reception at Blenheim Palace.
"We have enough difficulty with the European Union".
"Unfortunately, there was a story that was done which was generally fine but it didn't put in what I said about the prime minister and I said a tremendous thing", he said. Although the British government has extended an invitation to Trump for a state visit, no date for it has been scheduled, reportedly because of the outrage it has stirred up among many residents and politicians from all parties.
Fears of an escalating U.S. trade dispute with China and the European Union also added to the upward pressure on the dollar.