Just come across this deal from Thomson flights. £143.96 per person to fly to Florida and back on the 3rd May for 2 weeks.
Not sure which other dates are available but I do know that if you only put in to do 1 week, e.g. 3rd - 10th May then it will cost £243.96 so £100 more per person.
This is my first deal so I hope I have done this correctly