Scottish airline Loganair has taken steps to lessen the impact of possible industrial action by air traffic control staff.
The strike is due to hit some Highlands and Islands Airports Limited (Hial) airports next month.
The Advisory, Conciliation and Arbitration Service (Acas) is being asked to help resolve the pay dispute involving air traffic controllers.
Controllers who are members of the Prospect union are seeking an improved pay deal from their employer, Hial.
Industrial action by the Prospect members is due to start in April and continue through the summer.
Prospect and Hial have agreed to seek the support of Acas.
Representatives from the union and airports company have met three times since the result of a ballot on strike action.
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Seven of Hial’s 11 airports would be affected by strike action.
They are Benbecula, Dundee, Inverness, Kirkwall, Stornoway, Sumburgh and Wick John O’Groats.
Talks are still ongoing between Hial and the union, but as things stand there is a full stoppage on April 26 and action short of a strike from April 1.
Loganair has taken action on some flights to and from Shetland, Orkney and Stornoway.
Affected flights have been taken off sale for April 26 with a free re-book in place for customers already holding reservations – a skeleton schedule will still operate should the action be called off.
A small selection of afternoon flights has been re-timed between April 1 and May 27 to prevent them being affected by the potential ‘short of strike’ action. These time changes are from five to 20 minutes and any affected passengers have been informed.
Loganair managing director Jonathan Hinkles said: “We’ve taken the prudent decision to re-time some of flights into and from Sumburgh, Kirkwall and Stornoway Airports to prevent them being impacted by possible industrial action at some of the Hial airports.
“It’s regrettable that we have had to inconvenience a small amount of our passengers and we hope our early intervention will minimise any impact. We remain hopeful that a resolution can be found to avoid any further changes for our customers.”