Calculating the headwind and crosswind components is a breeze.

Calculating great circle distances is easy, either between airports in the database or between any two Latitude-Longitude pairs.

Need to know the current time at your destination? The timezone calculator makes it easy! The airport database contains timezones for the airports, so you don't even have to know what time zone Hong Kong is in to find the time there.

Need to land before dark, and plan your arrival a week in advance? It's a snap with the sunrise / sunset calculator!

Carbon dioxide emissions are easily computed with just the total fuel burned from a flight.