REUTERS - Delta Air Lines Inc
The sale by Singapore Airlines, 56 percent owned by state investor Temasek
The sale by Singapore Airlines came after sources familiar with the matter said Delta, the second-largest U.S. airline by operating revenue after United Continental Holdings
Heathrow is a lucrative hub for corporate passengers where landing slots are hard to acquire.
The deal, which Delta said would lead to a trans-Atlantic joint venture with Virgin Atlantic, is subject to regulatory clearance in the United States and Europe.
Singapore Airlines bought 49 percent of Virgin Atlantic for 600 million pounds in 1999, but wrote off goodwill amounting to 96 percent of its purchase price of Virgin.
(Reporting by Anshuman Daga)