Most of Anchorage to Belize would be within two or three countries: USA, Canada and Mexico, and two main official languages English and Spanish. (Obviously numerous indigenous minority languages.) London to Calcutta would have been much more diverse, but even within the Indian leg you would encountered more languages...

I actually can't find any evidence that there ever existed a direct Anchorage-Belize trip. The parent comment implies that the company merely offered routes that extended to these destinations, but not necessarily as a single trip.

How did you compute the distances? Geodesic?