The pair, who were the only ones in a row of four, said flight attendants put the woman in one of the spare seats for the remaining four hours of the flight.
In a statement to Sky's US partner network NBC News, Qatar Airways said: "First and foremost our thoughts are with the family of the passenger who sadly passed away on board our flight.
Mr Ring also said he was told to stay put while medical teams removed blankets covering the woman when they landed, and that they were offered no support.
A couple have said they were forced to sit next to a dead body for four hours on a Qatar Airways flight.
Mitchell Ring and Jennifer Colin were travelling from Melbourne to Doha, en route to Italy, when a woman walked out the toilet and collapsed near their row about 10 hours into the journey.
