Neither Trump nor North Atlantic Treaty Organisation offered specifics on what Trump said he had achieved.
A helicopter took them from the airport to the U.S. ambassador's residence here.
They believe the publicly-owned facility should not be available to Trump, whose US Muslim travel ban has been heavily criticised around the world, but the Scottish Government said ministers do not intervene on how the airport is run.
As Trump is expected to discuss a possible post-Brexit trade deal and other worldwide issues with May, organizers of Friday's demonstrations say there is no shortage of issues that will inspire mass numbers of people to attend.
The visit is seen as crucial at setting the course for a closer trading relationship between the two countries.
In sharp contrast to the president sharp words, Trump's first event in England was an oasis of warm greetings at an evening reception at Blenheim Palace, birthplace of Winston Churchill, the larger-than-life British leader cited by the president as a model of leadership.
Speaking to reporters in Belgium after a fiery Nato Summit, Trump had described the United Kingdom as a "hot spot right now with a lot of resignations" and dismissed the prime minister's Chequers plan on the next stage of Brexit. "I think they like me a lot in the UK". These will focus on relations with Russian Federation, trade, Brexit and the Middle East.
The trip coincides with a tumultuous week for May after two senior ministers resigned in protest at her plans for trade with the European Union after Britain leaves next March.
Trump's Marine One departure from the ambassador's residence was met by jeers from demonstrators banging pots and pans, and another pack of protesters lined roads near the palace.
The two leaders will hold talks at the prime minister's country residence of Chequers where Russia, Brexit and the Middle East will top the agenda.
Despite the welcome from May, many Britons are opposed to Trump's visit.
"He is thanful for the wonderful welcome from the Prime Minister here in the U.K".
Donald Trump hailed Boris Johnson as a future prime minister, accused the London mayor, Sadiq Khan, of doing "a bad job" on terrorism and said there had been too much immigration in Europe in an incendiary interview that raised questions about the decision to invite him to Britain.
He has clashed with the Labour mayor several times in the past, including over his administration's visa policy and most recently over Khan's decision to allow a huge Trump blimp to fly over London.
The Glasgow protest is one of several being held across the country over the next two days, with anti-Trump campaigners also expected to target his Turnberry and Menie golf courses as well as the USA consulate in Edinburgh.