I've found a really good way to find cheap flights to anywhere in the world also you can choose which airport in the UK you want to depart from. The dates are also flexible
Around the year so you can choose if you want to go within the summer or Easter. Just press where you want to go then press whereabout it is in the country then choose which UK airport you want to depart from. Then you have to choose on the calendar which month and day you want to go on. After you've done that all the results will come up and you can choose when flight you want to take. Also not all flights are from £16 it starts from £16.
Please be kind on the comment page and this does really work so I hope that I shouldn't get any colds
The website used is skyscanner.