Loganair have a sale on of their air fares from 8 to 15 September for travel from 1 October 2026 and throughout 2027, to get 17% off.
Enter TARTAN17 as the promo code at checkout.
There are exclusions - I can't easily find what they are, but would be surprised if the sale includes Orkney inter island flights and the PSO routes to the Outer Hebrides (Benbecula always seems to be a commercial route)