The incident occurred on Air India flight AI 602, which took off for Mumbai from Delhi yesterday.
When contacted, an Air India spokesperson said there was a medical emergency onboard the plane which was attended.
"As the flight AI-602 was on its way to Mumbai there was an announcement made by the hostess, asking if there was any doctor onboard to attend a medical emergency," one of the passengers said.
A doctor and an ambulance were waiting as soon as the plane came to a halt.