Loganair will be unable to serve airports operated by Highlands and Islands Airports Limited (HIAL) on July 29 because of a one-day strike by air traffic controllers.
The industrial action will affect six airports – Inverness, Sumburgh, Kirkwall, Stornoway, Benbecula and Dundee.
The airline will be cancelling flights affected by the action and customers will have the option to transfer their booking or obtain a full refund.
Passengers on affected flights will receive an email from Loganair on Thursday (July 15) setting out these options.
To help passengers before and after the strike, there will be extra services on July 28, departing Kirkwall at 19:00 and arriving at Aberdeen at 19:50; and from Aberdeen to Kirkwall on July 30, departing at 06:10 and arriving at Kirkwall at 07:00.
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Loganair plans to operate larger aircraft on several other services on July 28 and 30 to provide additional seats to help customers re-arrange their travel plans.
Flights to and from Islay, Barra, Tiree and Campbeltown will be unaffected as the flight information service officers who oversee arrivals and departures at these airports are not part of the dispute.
Loganair’s teams are checking whether it may be possible to provide inter-isles air services within the Orkney Islands on July 29 and will provide a further update on this as soon as possible.
Jonathan Hinkles, chief executive at Loganair, said: “We are hugely disappointed by this strike action by the union representing air traffic controllers at HIAL airports, and can only ask for our customers’ understanding that we are unable to avoid the inconvenience that these flight cancellations will inevitably cause to travel plans, hospital appointments and island deliveries of freight and mail.”