Trying to figure out how airlines determine fares is utterly futile, but that doesn’t necessarily dampen my curiosity. On a recent visit to the Star Alliance headquarters in Frankfurt, I sought insights into how the global group sets its popular round-the-world fares.

I always enjoy dropping by the alliance’s modest office — not only because it’s an easy walk from the airport terminal, but also because just about everything it does is unique and pioneering in the industry. With 27 member-carriers, one would think it’s a grand operation, so I was surprised that fewer than 80 people work there…