"I think he is a great representative for your country", the U.S. President said of Johnson, speaking days after Britain's former foreign secretary resigned in protest over Theresa May's Brexit plans.
The blimp, designed by Leo Murray, flew over Parliament Square in London on Friday when organizers said almost 250,000 people took to the streets to mark Trump's first visit to the U.K.as president.
The U.S. president was seen with First Lady Melania Trump at Windsor Castle, after it was revealed earlier this week that the meeting would take place.
"The idea that we would park our rights and privileges and freedoms because it may cause offence to a USA president, I think people in London and the United Kingdom would find objectionable as indeed would Americans", he said.
London Mayor Sadiq Khan, who was criticised by Trump in the Sun interview for failing to control crime and prevent militant attacks, gave his blessing for the blimp to be flown and rejected suggestions this showed a lack of respect to the us president.
A giant inflatable "Trump baby" will be brought to Scotland to coincide with the United States president's visit over the weekend.
Together against Trump: People take part in an anti-Trump protest in London on Friday.
He also laid into British Prime Minister Theresa May, saying: "She didn't listen to me".
"I think most people in Britain will think this is that this is a fair, pragmatic and reasonable approach".
"We will do a trade deal with them and with others around the rest of the world", she added. I think she's a terrific woman, and I think she's doing a terrific job.
President Trump responded to the blimp during his interview with The Sun and went on to compare it with the general opinion of him. "That's why we flew over him with a message branding him well below par".
Murray, 41, who organized the blimp, told The Washington Post in an interview on Friday that the protesters will be escorting the blimp to meet the president in Scotland. "But when they make you feel unwelcome, why would I stay there?" he said.
"I have a lot of respect for Boris". And yes, the balloon was even approved by the City of London. He said: "The people voted to break it up, so I imagine that's what they'll do. I said, 'I want to apologise because I said such good things about you, ' And she said, 'Don't worry, it's only the press, '" Trump said.