“I'll be there,” he told reporters in the White House.
Operation Overlord was launched on June 6, 1944, sending waves of US and other Allied soldiers onto the French coast where they dislodged German forces
and began the liberation of France and the eventual battle for Germany itself, ending in defeat for the Nazis.
The Normandy trip will add to a relatively busy summer of international travel for Trump, who is also expected to go to Japan twice and to a G7 summit in August in Biarritz, France.
The US president was last in France, along with dozens of other world leaders, to commemorate the centenary of the end of World War I in a solemn ceremony in Paris in November 2018.
Trump, along with his Russian counterpart, arrived separately from other leaders at the commemorations, which took place in the rain.
Minutes before the start of the ceremony two topless protesters from the radical feminist group Femen attempted to waylay Trump's motorcade as it rolled up the Champs-Elysées. They were immediately overpowered by police.
During the trip, Trump cited the bad weather for his decision to cancel a visit to an American cemetery in northern France — a decision for which drew criticism.