According to The Telegraph, they are understood to have booked a weeklong tour of southern Jordan to visit the ancient city of Petra and the Wadi Rum desert valley.
The newlyweds will leave London for their honeymoon the day after the wedding on April 29, and are believed to be considering several options for their break, with Jordan thought to be their preferred foreign destination.
They may also spend part of it at one of the Royal estates, possibly Balmoral, the Queen's estate inScotland.
While the couple will be hoping for some privacy following their marriage, which will be attended by 1,900 guests and watched by a global television audience of two billion, they are expected to travel with a bolstered team of royal protection officers if they head to Jordan, to ensure their security.
Petra, also known as the 'rose-red city half as old as time' was carved out of a deep sandstone cleft in the desert 26 centuries ago by the Nabateans, an Aramaic people.
Spread over seven miles, it is Jordan's star attraction, and has to be approached through a half mile-long entrance gully. It is renowned for its amazingly preserved tombs.
The couple is also expected to visit Jordanian capital Amman, where Miss Middleton and her family moved in 1984.
They may also pay an unofficial visit to King Abdullah and Queen Rania of Jordan who are close friends of the Royal Family and will be among the wedding guests.