Click or tap on the ad to reveal the answer.
How to guess it?
Among the small clues, there is the Star Alliance logo, limiting the number of Asian airlines (obviously) that could be advertising. To limit even further the number of airlines, there are the PTVs (Personal Televisors) in every service class of this airline.But the most distinctive feature is the flight attendant's uniform and persona. It is featured in many of this airline's TV commercials.
And for those who had no idea what this airline's uniform looked like, there was the little bit of trivia mentioned in the ad: "The First Dolby Headphone surround on any airline".