Istanbul's Sabiha Gökçen to Build Terminal 3 as Traffic Tops 50 MillionIstanbul's Sabiha Gökçen Airport will begin Terminal 3 construction in 2026 to handle passenger traffic expected to exceed 50 million annually.Mar 3, 2026•4 min•Sabiha Gökçen AirportAirport ExpansionIstanbulPegasus AirlinesLow-Cost CarrierAIRPORTS