Offline version of Great Circle Mapper?
 

Does anyone know of any offline tools that are similar to the Great Circle Mapper website? For those unfamiliar with it, the website calculates flight distances between airports or for any multi-airport routing. Its extremely handy and I'd love to find a tool that can do it offline for using on (you guessed it) airplanes.

Blast from the past! Does anyone have an answer to this?

I keep a spreadsheet with about 15000 different routings (x 2 for return) extracted from various sources. Not 100% accurate or 100% complete but good enough for most purposes.

I have Microsoft Street & Trips(USA) and AutoRoute(Europe) installed on my notebook. They both allow me to plot a course between any two points in the world and display the distance.(A to B) It's pretty useful if all I want to know is the distance from Tokyo to London, for example.

Flying Fish mileage tool?

It might use the internet to find the mileage though, my computer is always connected to the internet so never tried it offline. Also gives option to add COS, Elite and promotional bonus percentages ^