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.
The answer was easy to get in this ad, and not so many people got it wrong. I guess it was too obvious. Before continuing, remember: this was a magazine ad published in a National Geographic issue, presumably in the 1960s. Ready? Scroll down!

How to guess it?
Very simply: it was all in the koala. The association between the koala and Australia is in the minds of many people. You could also remember that this particular koala was featured in many Qantas advertisements, including on television, and his venting on the increasing number of tourists visiting Australia was heard by millions all over the world.
Statistics
Correct answers: 83% | Wrong answers: 17% | Most submitted wrong answer: United (7%) | Other answers submitted: Air Australia (sic), Air New Zealand, Australian Airlines, Ansett Australia.