Hi debbq,
Just had a quick look & Thomsonfly have flights for dates around these dates, couldn`t really do a price check; as not sure how many people are going. Hope this is of some help, & you get what you`re looking for.
Best Regards, Brigger

it's probably school half term week..................

It is school half term week, expect to pay what you usually do, plus another 50%, if not double.

If those have to be the exact dates, then British Airways are coming up with some better prices. However these are oeprated by the franchise operator GB Airways. And GB Airways are in the process of being sold to easyJet, so be aware that if you book, you will end up on a no frills easyJet flight rather than a BA service.

easyJet also operate their own route to Mahon but haven't released their flights for the route yet. So may be worth holding back to see what happens.