Related Clues:

• Bygone Eastern rival
• "Up, up and away" carrier
• Its hub was in St. Louis
• Howard Hughes's airline
• Defunct airline
• Airline abbr.
• Defunct flier
• Erstwhile airline
• Onetime name atop N.Y.C.'s MetLife Building
• It flies no more
• Howard Hughes' airline
• American Airlines acquisition
• TWA competitor
• One-time intl. airline
• Former airline initials