Cost Difference Between Economy and Business Class Explained

Business class costs about 3.5 times as much as economy on average, or 250.19% more, across a global sample of airline routes. But the gap ranges from only 82.22% more on some routes to more than 12 times the economy fare on others. That makes the cost difference between economy and business class less predictable than most flight guides suggest. The cabin itself matters, but the itinerary, fare rules,...