Jett Travolta, the eldest son of John Travolta and Kelly Preston, died at age 16 after suffering a seizure while the family was on vacation in the Bahamas in early January 2009.

What happened medically

  • Jett had a long history of seizures and was found unconscious in a bathroom at the family’s accommodation on Grand Bahama Island.
  • Efforts were made to revive him and he was taken to Rand Memorial Hospital, where he was pronounced dead; his death certificate listed the cause of death as a seizure or seizure disorder.

His health before his death

  • Jett had been diagnosed in childhood with Kawasaki disease, an illness that causes inflammation of blood vessels, and he also experienced recurring seizures over the years.
  • John Travolta later stated publicly that Jett was on the autism spectrum and that seizures were a regular and serious medical issue for him.

Aftermath and family response

  • Jett’s remains were cremated in the Bahamas, and his ashes were taken back to Florida by his parents soon after his death.
  • In the years since, John Travolta has regularly shared public tributes on Jett’s birthday, speaking about his grief and love for his son and keeping his memory alive for fans and friends.

TL;DR: Jett Travolta died in 2009 at 16 years old from a seizure during a family vacation in the Bahamas, after a long history of seizure-related health problems.

Information gathered from public forums or data available on the internet and portrayed here.