Related Clues:

• Postal beats, briefly
• Cockpit announcements, briefly
• Letters from Plato
• Announcements at LAX
• Expected landing hrs.
• Logan info
• In-flight figs.
• Followers of zetas
• Socratic vowels
• Stats for 52-Across
• H, H, H
• Hesiod's H's
• H H H, in Greece
• Theta preceders
• BWI guesstimates