Related Clues:

• 747 letters
• Airline founded in 1927
• Air letters?
• Terminal letters
• 'Find out how good we really are' sloganeer
• Ambassadors Club carrier
• Clipper name
• Former intl. airline
• Letters on some liners
• China Clipper carrier
• Co. founded as Western Air Express
• Delta rival
• 'The things we do to make you happy' sloganeer
• Major airline
• Howard Hughes once controlled it