31.   Both airlines have flights to Miami, and Avianca also flies into New York.

32.   Both airlines also have fewer unions representing their workers than most other U.S. carriers, a fact that would likely make meshing the two work forces easier.

33.   Boeing has a larger selection of aircraft than Airbus, and more airlines have Boeing planes already.

34.   -- All airlines would have to have certified dispatchers, who are technicians on the ground who check fueling, loading and other details.

35.   -- Although most airlines have departments whose job is to continually look for ways to improve safety, such departments are not required by law.

36.   A customer service representative said that in disputes with airlines Travelocity does whatever it can to help, but that the airline will have the final say.

37.   A Delta spokesman said the airline had other cross-checks and had not had any problems with planes taking off with insufficient fuel.

38.   A Delta representative acknowledged Wednesday that the airline had problems correctly forecasting its passenger loads.

39.   A recent study by the World Bank found this form of arrangement most prevalent at airports where one airline has a big hub.

40.   A spokesman for US Airways referred calls to Shuttle because the two airlines have separate labor agreements with their pilots.