Related Clues:

• "Up, up and away" carrier
• Its hub was in St. Louis
• Howard Hughes's airline
• Southwest rival
• Defunct airline
• Airline abbr.
• Former name in flight
• Old carrier name
• Former carrier name
• Carrier affiliated with the Trump Shuttle
• Defunct flier
• Erstwhile airline
• It flies no more
• Name on planes, once
• Howard Hughes' airline