Istanbul Airport (IST), the larger of the two, sits well northwest of the centre on the European side and is the natural arrival point for a stay based in Sultanahmet’s old city or Beyoğlu’s newer streets around Taksim and Istiklal Avenue. Sabiha Gökçen Airport (SAW) sits on the Asian side, and is the better arrival point for a stay based around Kadıköy or Üsküdar — flying into the airport that matches the district saves a long cross-city transfer before the stay has even begun.
Within the European side itself, the Golden Horn splits the old city — Sultanahmet’s mosques, palaces and museums — from the newer city around Beyoğlu and Taksim, a livelier register of restaurants, bars and boutique hotels. A stay that names its side of the Bosphorus and, on the European side, its side of the Golden Horn, tends to plan its airport transfer and its days more realistically than one that treats Istanbul as a single undifferentiated centre.