I am looking for a website/application that will allow me to monitor some airport or airports in some area and send me the deals when something is interesting (much cheaper than average) to my mail.
I am located in Rome and I don't know where I want to go, but I want the flight to be at least 50% cheaper than an average price of that flight. And if some flight suddenly became that cheap e.g. to Madrid or Budapest or London, I get an email or some other message or something like that.
Or if no email/messaging is available, then a website where I select some airport and it shows me some good deals for low-coast flights from that airport in the next couple of days or weeks, that would be great too.
Any idea if something like that exists?