A Delta Air Lines flight from Manchester, N.H., was safely diverted to Logan International Airport Friday morning, officials said. Flight 1941 departed the airport at 7:15 a.m. and was scheduled to fly to Atlanta. Shortly after the plane took off, “fumes were observed in the aircraft,’’ Delta spokesman Morgan Durrant said in an statement e-mailed to the Globe. The MD-88, with a crew of five and 144 passengers on board, was diverted and landed safely at Logan. Passengers were safely deplaned, said Matthew Brelis, Massport spokesman.