The angry response follows accusations that the US carrier is cooperating with American Airlines on routes “outside the scope” permitted by their new Northeast alliance.
Two new short-haul routes will start from Zurich and three from Geneva this summer, but the airline does not expect demand to pick-up until the third quarter of the year.
Carriers are hopeful that direct air service will resume in the coming months despite an ongoing federal prohibition on flights between the US and Venezuela.
