Istanbul is a beautiful and historic city that is definitely worth visiting while you are in Turkey. If you are looking to take a tour of Istanbul from Alanya, there are several options available.

One popular option is to take a flight from Antalya, which is the closest major airport to Alanya, to Istanbul. There are several airlines that operate flights between Antalya and Istanbul, and the flight takes around one hour. Once you arrive in Istanbul, you can take a guided tour of the city's historic landmarks and cultural attractions, such as the Hagia Sophia, Topkapi Palace, the Blue Mosque, and the Grand Bazaar.