Powdair have just announced year round flights from Sion to Zurich, London City, and Antwerp. 3 per day to ZRH and up to 2 per day to LCY. These are in addition to the winter ski programme, which has been changed slightly by the dropping of Edinburgh and Hamburg and increase in frequencies on other routes apparently due to demand.
In addition to the CRJ200 from Backbone they will have two Saab 2000s from Adria Switzerland. I wonder what Skywork will make of this and the potential impact on their Bern-LCY route.
This link is via the Sion airport website
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Sion: Powdair va étendre son offre et proposer des vols