British Airways is making significant adjustments to its London-based network for the Winter 2025-26 season by discontinuing flights to Istanbul Sabiha Gökçen, Grenoble, and altering its Zagreb route. The last flights to Istanbul Sabiha Gökçen and Grenoble will be on October 26, 2025. The decision to cut the Istanbul Sabiha Gökçen route comes after BA’s struggle to attract premium travelers, despite the airport’s growth as a hub for low-cost carriers. BA will now focus on Istanbul Airport, which offers better business connections. The Grenoble route, popular with skiers, is being dropped due to shifting demand and competition, though Geneva, Innsbruck, and Zurich remain as options. Meanwhile, the Zagreb service will switch to a seasonal summer schedule, aligning with peak travel months. These changes are partly due to BA’s fleet challenges, specifically with Rolls-Royce Trent 1000 engines affecting its Boeing 787s, leading the airline to prioritize high-demand routes. Travelers affected by these changes have alternative options, such as other airlines flying to nearby airports. Additionally, BA is launching new routes to Kuala Lumpur and increasing flights to Tromsø, reflecting its focus on high-demand long-haul destinations. Travelers should stay informed about these changes and explore alternative travel options if needed.