If you're wondering What Terminal is Delta at Heathrow Airport, the airline operates from Terminal 3, offering a smooth and efficient travel experience. Delta passengers benefit from streamlined check-in, fast security lanes, and a variety of shopping and dining options. The terminal features modern amenities and attentive staff to ensure comfort and convenience throughout your journey. Whether you're flying for business or leisure, Terminal 3 at London Heathrow delivers a world-class experience tailored to meet every traveler’s needs. Start your journey with Delta at Terminal 3 for reliability, ease, and excellent service.