William and Kate "thoroughly enjoyed their time together, and they are grateful to the Seychelles government for their assistance in making the honeymoon such a memorable and special 10 days," a palace statement reads.
The honeymooners left the luxurious seclusion of the islands on Friday.
"They left happy and clearly content with their stay," the head of the Seychelles tourism board, Alain St Ange, told the Associated Press.
And foreign minister Jean-Paul Adam told the AP they "are truly honored that Prince William and his wife chose to return to Seychelles for this special holiday and we are proud to have been able to offer them a peaceful and private getaway."
Officials will not say when William, 28, is due back at work at his base atRAF Valley in Anglesey, but it is thought he will be back in the skies as a helicopter search and rescue pilot in the coming week.
Next up? The ceremonial duties to mark his grandmother Queen Elizabeth's 85th birthday – at the so-called Trooping the Color – on June 11, followed by the birthday celebrations for grandfather, Prince Philip, on June 12.