President Donald Trump lashed out at London Mayor Sadiq Khan on Sunday night — by comparing him to a “shorter” version of Mayor Bill de Blasio.

The president made the remarks ahead of his flight to London, where he said has no intention to meet with Khan — who recently called Trump a “global threat.”

“No, I don’t think much of him,” Trump told reporters of Khan outside the White House Sunday. “I think he’s, he’s the twin of de Blasio, except shorter.”

The relationship between Trump and de Blasio has been anything but cordial.

Shortly after de Blasio announced his long-shot presidential-bid last month, Trump called him the “worst mayor in the history of New York City.”

De Blasio responded with his own mud-slinging, referring to Trump as a “con artist” and dubbing him “Con Don” during an appearance on “Good Morning America.”

Trump left Sunday night for the United Kingdom, the first stop of a five-day trip to Europe.

He’ll also visit Ireland to meet the prime minister, then head to France to commemorate the 75th anniversary of D-Day in Normandy.

With Post wires