Related Clues:
- Airplane passengers may check them: Abbr.
- They precede thetas
- Incoming plane stats.
- Letters after upsilons
- Headwinds may affect them, briefly
- JFK stats
- Omega preceders
- In-flight estimates, for short
- Attic vowels
- Greek letters that look like P's
- Airport monitor info, for short
- Greek N's
- Some guesses, for short
- Greek concluders
- Preceders of xis