Loganair have a sale on currently with 15% off all flights in 2024 after February 1- book by 9 January 2024 using discount code SAVE15.
It does not apply to the subsidised routes to/from Tiree, Barra, Campbeltown and Orkney Inter-Isles services.
Thanks Stuart! I passed the link on to a friend that is doing an Orkney/Shetland tour in August (same one I did last year). I don't know if she is ready to book flights yet but thought she might want to know anyway!