US – American airline Delta Air Lines is offering consumers on its SkyMiles frequent-flyer scheme the opportunity to upgrade their reservations and travel on a private jet. Upgrade will cost £192.70 (€273.40, $300) to £513.70 (€729, $800)Aimed at a selection of high-value customers ‘This is an innovative way for us to thank valued Delta customers for their loyalty’ – John Caldwell, president of Delta Vacations