If you’re not driving out, then you’ll need to get booking those flights ASAP.
As with all holidays, avoid school summer holiday months. Flight prices sky-rocket around these times. I’m a big fan of Sky Scanner, as you can search for flights across a whole month period and see which date is the cheapest to fly.
There’s plenty of low-cost airlines out there to book through, but check the sports equipment fees first. Cheeky airlines like Ryan Air will charge you a whopping £50 one way for a surfboard. It may make that cheap as chips flight not so appealing…
Also invest in one of these luggage scales to avoid wearing all your clothes/wetsuit on the plane, instead of paying the excess baggages charges.