The four-times-weekly service got under way on Monday (16 January), and will increase to five-times-weekly in April.
Luxembourg’s Luxair is operating the route using a 78-seat De Havilland Dash DHC-8-Q400 aircraft. Flights depart City at 6.40am with a flight time of one hour. Fares lead in from £45pp.
London City said the route was emblematic of its 2023 aviation strategy, which will aim to connect London with more "underserved" European cities.
Anne Doyere, London City director of aviation, said the airport had "long coveted" a resumption of the Antwerp route.