Visualizing global aircraft flight paths between continents is now much easier thanks to air traffic management software developed by NASA in 2006 that has included further enhancements.
In the following video you can see an example.
Traffic in 24 hours
For this, the FACET system (Future Air Traffic Management Concepts Evaluation Tool) receives data from the Official Airline Guide, which provides the departure and arrival cities, and the expected departure and arrival times. FACET then plots a Great Circle route between the linked cities and calculates where the plane will be at any given time.
As Kapil Sheth , an aerospace engineer at NASA’s Ames Research Center in California, explains:
We have used this ability to study the impact of global aviation emissions on the environment.