Four airlines cover this route well, and each has a distinct personality. British Airways routes through Heathrow with its Club Suite — a proper suite with a closing door, 1-2-1 configuration, and White Company bedding — and this is often the fastest connection given LHR's frequency into Stuttgart. Virgin Atlantic also connects via Heathrow with Upper Class, another door-equipped suite, and its Clubhouse lounge with the social bar is one of the better ground experiences in the sky if your layover has any breathing room. Delta runs its Delta One Suite through Atlanta or Minneapolis, with a private door and Tumi amenity kits — a strong choice if you're already Delta-loyal or based near an Atlanta connection. United's Polaris product, connecting through Houston or Chicago, is a lie-flat pod rather than a full suite, but it's consistently well-reviewed for comfort and includes Polaris lounge access and Saks Fifth Avenue bedding. For Orlando to Stuttgart business class, we generally steer clients toward the London connection when schedules align, since it shortens the overall itinerary and BA/Virgin's Heathrow frequency into STR is strong.