Airline Economics
• Calum Wilson
Southwest and Turkish Airlines sign interline to offer one‑ticket transatlantic itineraries via Istanbul from January 2026
Southwest Airlines and Turkish Airlines will implement a limited interline agreement in January 2026 enabling single‑ticket transatlantic journeys between U.S. cities and Istanbul, with through‑checked connections across both carriers’ networks. The move follows recent European partnerships as Southwest expands international distribution.
