Have you ever dreamed about upgrading your economy flight to a seat in business class? While the switch may be out of reach for most of us, new research has found an upgrade is not always prohibitively expensive. Holidu, a leading provider of holiday rentals across Europe, analysed the price difference between economy and business class fares from over 30 of the world’s biggest airlines to find out whose premium experience is the best value for money. On average, they found that business class is 250 per cent more expensive than flying economy – but some airlines have markups as low as 88 per …