I’m not surprised that the last one built is still flying. I’m more interested in what is the oldest still flying.
The oldest B-52 Stratofortress still in active service is a B-52H model with serial number 60-0001, nicknamed “Memphis Belle IV”. Delivered to the United States Air Force in May 1961, it is currently assigned to the 2nd Bomb Wing at Barksdale Air Force Base in Louisiana.