Every month, an airline printed advertisement, minus airline name and logo, is displayed for your guessing pleasure on Guess The Airline. The following is the answer to a previous game.
Once again, this was an advertisement published in a National Geographic Magazine issue of the 1960s. Ready? Scroll down!

How to guess it?
There were only two major clues here: the route map (within Pakistan and what is now known as Bangladesh) and the Trident 1E fleet.
Statistics
Correct answers: 40% | Wrong answers: 60% | Most submitted wrong answer: BOAC (16%) | Other answers submitted: Aeroflot, Air India, BEA, British Airways, Eastern, KLM, SAS.