Efstathios "Stathis" Kefallonitis (born 1977) is a Greek-American consumer engagement strategist, neuroscientist and member of the leadership team at United Airlines. He has had a scientific career at Embry-Riddle Aeronautical University & University College London. He is a foundation board member of the International Flight Services Association (IFSA) & a former board member of the International Flight Services Association.