Flight SQ403, which landed in Singapore this morning, was not diverted, a SIA spokesperson said, without identifying the deceased or nationality.
"We can confirm with regret that a passenger had passed away on flight SQ403 from New Delhi to Singapore today," the spokesperson said.
"For privacy purposes, we are unable to share any further details. Our condolences go out to the family of the passenger at this time," the media reported, citing an email reply by the airline spokesperson.
According to a source who was on board the flight, the deceased was "a man in his 30s, and was travelling with his wife and child". SIA declined to confirm these details.