Olympic holidays still have to make a decision on Larnaca and Heraklion this summer , the flights are still on hold as the original carrier was EuroCypria but the company are struggling to find another airline to operate these services now . The demand has always been high on these 2 routes but no airline this year has spare capacity to fit in !!
Exeter , Humberside and Norwich are all in a similar position with these routes with " Viking Hellas " a possible option but as each week goes by now it looks less and less . Very frustrating !!
I think you have wrongly grouped these airports together. Olympic flights from HUY to both LCA (Viking Hellas) and HER (Cyprus Airways) are on sale, as is EXT-LCA (using TOM). But for BOH-HER/LCA and NWI/EXT-HER, while appearing in the drop down menu on the Olympic website, no dates can be selected. So Olympic must feel pretty confident they have secured the required capacity at HUY unlike elsewhere
Though I totally understand the position BOH and Olympic are in. Thomas Cook ditched their HUY-LCA as soon as ECA stopping flying