Related Clues:

• Delta alternative, once
• Co. of which Howard Hughes became the principal shareholder in 1939
• Bygone USAir rival
• Defunct carrier
• Defunct flier with a blue-globe logo
• Howard Hughes's erstwhile carrier
• Airline until 1991
• Former frequent flier
• Flier that had a St. Louis hub
• Big airline until 2001
• First commercial carrier to use the Boeing 747
• Intl. carrier, once
• 'Catch Me If You Can' carrier
• Old Delta rival
• Co. acquired by American Airlines in 2001