Let me note that while my company has a fairly clear statement on when Business is permitted (>8 hrs), my decisions frequently remain conflicted. This is because where I am located (Washington, DC) is just below that time threshold for eastbound travel to London, and only a fraction of an hour longer than that for travel elsewhere in most of Europe. Westbound flights are about 45 minutes to 1 hour longer. Thus, my personal decision, often comes down to the price. Economy roundtrip tickets are $800-$1600. Business tickets can range from $2800-$10,000 (apparently depending on what Keynes called "animal spirits"). If the Business price is more than four or five times the Economy price, I just cannot personally justify throwing the extra money to the airline -- even though its not my money. I just wasn't raised that way.