Few airline routes are as lucrative as the one between the financial powerhouses of New York and London. On Tuesday, Delta Air Lines signaled that it was going after that business-heavy market, agreeing to buy a 49 percent stake in Virgin Atlantic from Singapore Airlines for $360 million. The deal will provide Delta with more access to Heathrow Airport, one of the world’s busiest hubs, where takeoff and landing rights are limited because of high demand and tight capacity. New York, where all major airlines are battling to attract high-paying passengers, is the top international destination from Heathrow. – read more via NYTimes