Zelenskyy traveled on U.S. military aircraft to Washington and will do the same when he departs, two U.S. officials told NBC News.

The U.S. has been involved in security logistics and provided travel assistance throughout his journey, multiple officials said. One official added that NATO allies provided fighter jets to help with escorts during transit.

A Ukrainian flag could be seen flying over Blair House, a residence across the street from the White House where foreign dignitaries typically stay when visiting the U.S.