The Blue Marble Mapper
The Blue Marble Mapper takes the 3-letter airport ICO codes of two airports (ie, LHR for London Heathrow and LAX for Los Angeles), draws a map showing the two locations and with the Great Circle route between the two points and details of the distance embedded into the graphic. We already use a version of the Blue Marble Map to plot the flight status of Virgin Atlantic aircraft. Don't know what the ICO code of an airport is? No problem, we have a tool for that too.