we found some low cost flights with ryan air to Italy. August this year, my wife, our 2 kids 12 and 13 are flying for £220.00 all in, return. It’s probably even cheaper from gatwick/heathrow?, but stanstead is only about an hour from us, and much nicer to navigate round!
We are staying in a chalet on the beach, in a big campsite just outside Lido de Jeselo, and a short boat trip to Venice. Booked direct with campsite. It shows it’s well possible to do holidays in the sun on the cheap still. Just as well with our Spanish fiasco!