The dog was in a small pet carrier created to fit under an airline seat. This poor family paid $125 for their pet to be murdered in front of them.
Another passenger on the flight posted a photo on Twitter of the dog's owner and children after the plane had arrived in NY.
Passengers reportedly heard the dog barking during the flight and found out that the dog died when the flight was over. She said the woman was "very hesitant and reluctant", and explained her dog was in the carrier.
However, Gremminger said a flight attendant came by, and told the woman she would need to put the bag in the overhead bin because it did not fit properly under the seat.
Gremminger turned around and saw that the pet owner had collapsed to the floor, rocking back and forth while clutching the dog's body.
'The flight attendants of flight UA1284 felt that the innocent animal was better off crammed inside the overhead container without air and water, ' he wrote on Facebook. "Her daughter was also crying", she said. Last June, rapper SchoolBoy Q accused United of putting his pet dog on the wrong flight to the wrong city during a layover.
A spokesperson for United said the airline will investigate the dog's death "to prevent this from ever happening again". "My heart is broken", she wrote.
A United spokesman addressed the incident in a statement to The Points Guy: "This was a tragic accident that should never have occurred, as pets should never be placed in the overhead bin".
Gremminer said she has been offered $75 credit by the airline which, she said, just makes things worse. United Airlines does not care about the safety of their furry travelers.
In 2017, United had the highest number of animal deaths of any USA carriers, according to a Department of Transportation (DOT) report, with 18 animals killed and 13 injured in transport.
According to company policy, a pet traveling in the cabin must be in an approved kennel.