Related Clues:
- Symbol for viscosity
- Metal core?
- Aviation acquisition of 2001
- In-flight info
- In-flight announcement
- Airline Howard Hughes bought in '39
- When a plane is due in: Abbr.
- One-time Delta competitor
- H, in Greece
- Homeric H
- Longtime Howard Hughes holding
- H look-alike
- Useful info at Dulles
- Seventh Greek letter
- One-time Howard Hughes airline