A woman gave birth on a short-haul flight from Valencia to Bucharest on Tuesday.
The passenger welcomed a baby boy on the Wizz Air flight, shortly before landing.
A Wizz Air spokesperson told AFP: "During descent and while taxiing to the terminal, the passenger was assisted on a back row of the aircraft by a crew member and a doctor who was travelling on the same flight.
"Mother and newborn baby were met by the airport ambulance and taken to hospital. We are very proud of our crew who handled the situation with professionalism and care.
"While this mother and her newborn baby seem well, we urge all our pregnant mothers not to risk their well-being and not to conceal their pregnancy."
In September, a London-bound flight with more than 100 passengers had to make an emergency landing in Palmas, Spain, when a woman gave birth mid-air.
The woman was reported to have experienced excessive haemorrhaging during labour. The pilot of the Nigerian Arik Air aircraft requested the emergency landing on the advice of two doctors on board.