I have travelled to London from the US, many, many times. From my experience, Virgin Atlantic is the best. They have excellent service...........and I love the video games they have at every seat. The airline is great in general. I have never been on British Airways. United is *ok* but it doesn't even come close to comparing to Virgin Atlantic. The only thing I don't like about it are the colors of their seats..............red, orange, blue........TOO BRIGHT! That doesn't really matter though.