Marine One just took off from the White House lawn, carrying President Trump to Joint Base Andrews for his send-off ceremony.
But it is not typical for a president's final flights to be officially called Marine One and Air Force One, since those craft only have those names when the President is on them. (Typically, presidents leave DC after the new president is inaugurated.)
The helicopter flight for the outgoing president typically becomes known as Executive One.
See moment Marine One takes off: