British Airways via Heathrow puts you in Club Suite, a proper door-equipped 1-2-1 suite with White Company bedding — a meaningful upgrade from BA's older cabins, and Heathrow's connection to Athens or nearby regional airports tends to be efficient. Virgin Atlantic's Upper Class, also through Heathrow, delivers a similar suite-with-door setup plus the Clubhouse lounge and social bar, which suits travelers who enjoy a proper pre-flight experience rather than just a seat. Delta One Suite, connecting through Atlanta or Minneapolis, gives you a closing door and Tumi amenity kit, and Delta's domestic connections from Orlando are frequent and reliable, which matters when you're already committing to a long day of travel. United Polaris, via Houston or Chicago, is a lie-flat pod rather than a full suite with door, but the Polaris lounge and Saks Fifth Avenue bedding make it a comfortable middle-ground choice, often at a lower price point than the suite products.