Sit on the Left side of the plane for the best views on flights from Istanbul to Porto. The left side delivers the most dramatic single moment of the flight — the Bosphorus and Istanbul on departure — and also captures the Iberian Peninsula's northern coast and the Cantabrian Mountains as the flight crosses northern Spain. The right side at Porto is excellent but briefer. Left wins on total scenic value across the full flight.

During takeoff from Ataturk (IST), sit on the Left side for the best views. Istanbul departures heading west on runway 06/24 or 18/36 give the left side a clear view over the Sea of Marmara, the Bosphorus strait, and the historic peninsula of old Istanbul with its dense skyline. The right side faces inland toward suburban sprawl with little of interest. Notable sights include: Bosphorus Strait, Sea of Marmara, Historic Istanbul Peninsula (Sultanahmet area), Prince's Islands.

When landing at Porto (OPO), sit on the Right side for the best views. Porto's runway 17/35 means arrivals typically come in from the north over the Douro River valley. The right side gets the Atlantic coastline, the mouth of the Douro River, and the city of Porto itself including the Ribeira waterfront district. The left side faces inland toward flat agricultural land. Notable sights include: Atlantic Ocean coastline, Douro River mouth, Porto city center and Ribeira district, Matosinhos beach.

The flight from Ataturk (IST) to Porto (OPO) takes Approximately 4 hours 15 minutes.

The route tracks roughly westward at 41°N latitude, crossing northern Greece and North Macedonia, then over the Adriatic Sea near Albania, across southern Italy's heel, over the Tyrrhenian Sea, Sardinia or Corsica depending on routing, then the Balearic Sea, crossing the Iberian Peninsula through Aragon and Castile, and finally the Cantabrian Mountains before descending into Porto. The Adriatic crossing and Sardinia are the most visually distinctive midpoint features.