Every month, an airline printed advertisement is displayed for your guessing pleasure on Guess The Airline.
This month, we have an advertisement published on a BusinessWeek issue from 1980. The name of the airline has been hidden everywhere. The aim is to Guess The Airline.

Vote for your answer below and come back on May 1, 2011 to find out if you were right!
UPDATE (May 1, 2011): Guess The Airline – April 2011 answer