Cheap flights anywhere?

i am looking for flights around the end of june/start of july, or the end of august time. the prices i have found so far are just way to expensive, i am looking around the �2,200 mark or so. it is for 2 adults and 3 children, aged 15, 13 + 8. it is from dublin or belfast international to orlando (MCO). i really need these flights to be found as it is for an urgent reason. PLEASE HELP! :(