Located in the south of Sardinia, Cagliari is actually the islands' capital city and is the gateway to the stunning beaches and fabulous lifestyle in this part of Italy. The airport, located in the north west of the city is easy to get to and from by both private car and public transport. From here, you can spend a few days in the main town, or hire a car and explore the southern coast, visiting impressive locations like the crystal clear waters of Spiaggia di Campulongu near Notteri and soft sandy beach of Spiaggia di Piscinni.
Flights to Cagliari on Sardinia can actually be quite cheap if you can be flexible, with low cost airlines offering prices from less than £70 per person return. Of course, the price can shoot up during the school holidays. The only direct flights from the UK to Cagliari are from London but Olbia in the north may be a possible alternative depending on what your holiday plans are.