I have just had an e-mail from thomsonfly advertising flights to Sanford at £99 each way including taxes. I couldn't find which dates they were, but thought I would mention it here in case it intrests anyone.
I've just done a search on their website and it looks like the cheap flight prices are for those leaving within the next 2-3 weeks. It's not the most user friendly offer as you have to search for individual dates of flights on the site to find out what the price is rarther than looking at all the availability and then picking the flights that are cheapest
If anyone is looking to book a spontaneous trip it might be worth a look