A Florida family is heartbroken after their dog died on a United flight from Boston to Fort Lauderdale that made a stopover in Newark, where the father claims Rock fried in the baking hot hold, according to a report.

John Paul Ciancimino, 45, told The Sun of the UK that Rock — a protection canine trained in Boston — that he was told there had been “an emergency” with his beloved pooch during the August 2017 flight.

“He was fried – they literally fried him,” Ciancimino told the news outlet. “He was completely blind by the time they found him.”

He said the death of the “one-in-a-million” Belgian Malinois left his kids Jon, 9, and Alysse, 5, “devastated.”

A vet’s report viewed by The Post suggests that Rock died from heatstroke.

“Rock was a member of the family. He was a special dog … he was very loving and affectionate,” Ciancimino said. “My son always talks about him. He was heartbroken.”

He said he had spent at least $68,000 on Rock’s training, but had yet to receive any compensation from the airline for the family’s loss.

“It’s not a matter of money. It’s the fact that there was never an acknowledgement of what they’ve done,” he told the Sun. “They treat your pets – your loved ones – as a piece of luggage.”

United said in a statement that it was “saddened by Rock’s passing.”

“Our PetSafe team is committed to the safety and comfort of all the pets that travel with us,” the airline told The Post.

“Upon Rock’s arrival in Newark, our team discovered that the dog injured itself while chewing through and escaping his kennel during the flight. We immediately transported Rock to a local animal hospital for medical care, where he passed away.”

It added: “When this unfortunate passing occurred, we were in contact with the customer and refunded the travel costs, as well as covering all related veterinary bills.”

Ciancimino’s lawyer Evan Oshan urged the carrier to “do the right thing” as “no living thing should die the way Rock died,” the outlet reported.

“The dog had an antemortem body temperature of 106 degrees F,” according to a necropsy report from the New Jersey Animal Health Diagnostic Lab that Oshan shared with The Post.

It added that the findings suggested that “heatstroke led to the death of this dog.”

Oshan told The Post he believed the family has so far not received any reimbursement from the airline.

United rep Charles Hobart told The Post that the cargo hold where the dog was placed was temperature-controlled and not excessively hot, as claimed by the family.

“Last year, we also overhauled our PetSafe program with American Humane to find ways to improve safety,” Hobart said in a phone interview, referring to the country’s first national humane animal organization.

He stressed that United also wants customers to be fully aware of the risks involved in transporting pets.

“It is risky and it is stressful for them,” he said.

Some 18 pets died on United flights in 2017, compared with two each on American, Delta and Alaska, according to the US Department of Transportation.