Delta Air line, Fortune Magazine's world most admired airline, is to begin direct flight operation from Accra to Abuja on December 1, East and West Africa Commercial Manager of the company, Bobby Bryan announced in Accra on Tuesday.The airline will operate weekly flights from Kotoka International Airport in Accra, Ghana and Abuja's Nmamdi Azikiwe International Airport.As part of Delta's $2 billion investment plan, the company hopes to redesign its entire customer service experience in the cities it operates from in Africa.The US airline will serve the route with a Boeing 767-300ER plane, equipped with 36 Business Elite seats, 29 seats in "economy comfort and 143 seats in economy.The investment, to span 2013, is to improve Delta airport facilities and global products, service and technology to enhance the customer experience in the air and on the ground.The new Abuja flight means Delta now offers non-stop service from Accra to four international cities. The other three cities are Atlanta, Monrovia and Dakar."With the ongoing support of our partner Air Nigeria, our Abuja service will provide more travel options for our Ghanaian customers as well as facilitate business between Ghana and Nigeria," Bryan said.Delta has also chosen Accra to launch its fifth anniversary in Africa celebrations next Tuesday. The celebrations are expected to take place in Ghana, Senegal and South Africa.