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Antalya's busy international airport is 10km east of the city centre on the D400 highway. There's a tourist information desk, and a number of car-hire agencies have counters here as well. It is well connected to Turkey and Europe by the Turkish airlines and summer flights operated by European carriers. Turkish Airlines and Pegasus Airlines have several flights daily to/from İstanbul, while Sun Express serves useful destinations, including Kayseri (for Cappadocia).
The AntRay tram is extending east to the airport; İsmet Paşa is the closest stop to Kaleiçi. If that hasn't happened when you visit, take the tram one stop to Murat Paşa (₺1.80) and catch bus 600 (₺4.20, half hourly).
To ride any public transport, you must buy an Antalyakart (rechargeable transport card) from a newsagent or on the bus. It costs ₺10, including ₺5 credit.
A taxi will cost ₺40 to ₺50.
There is also an hourly Havaş shuttle, which runs from the 5M Migros shopping centre near Konyaaltı Plajı (about 45 minutes). Coming into the city, it meets every domestic flight and stops at the otogar (bus station) before following the ring road to 5M Migros.