Nice, Florence, and Ibiza flights are operated by BA CityFlyer on Saturdays and Sundays on Embraer 190 aircraft.
The flights will offer Club Europe and Euro Traveller cabin service.
The Nice, Florence, and Ibiza flights join the recently announced new route to Split in Croatia from September.
BA also continues its weekly Sunday charter service between London Stansted and Calvi this summer in conjunction with Corsican Places.
It is the first time that British Airways has offered scheduled flights from London Stansted since before the pandemic.
It’s the fourth London airport to be served by the flag carrier.
The first flights to each of the three destinations took off on Sunday May 19.
Ciaran Brannigan, London Stansted’s Commercial Director, said: “These new services to Ibiza, Florence and Nice are strong additions to our route network, which now covers over 200 destinations across Europe, North Africa and the Middle East.”
