Swiss International Air Lines is to open services between Geneva and London Heathrow, initially using aircraft from Star Alliance partner and sister carrier BMI.
The Swiss carrier is also axing its link between Geneva and Bucharest.
Swiss will start the Heathrow route on 10 January, providing a high-frequency six-times daily connection, although it will reduce its current Geneva-London City flights from six to four daily.
It will assign two Airbus A320s to the new route, one of which will initially be supplied by BMI. Swiss will, at a later date, shift the services entirely to its own aircraft.
Swiss is cutting its four-times weekly Geneva flights to Bucharest, citing "insufficient market demand", but will continue to serve the Romanian capital via Zurich daily.