These maps show the arriving and departing flights from each of the airports mentioned above. One can see from the maps that Vancouver International Airport has a lot of flights that go abroad, but not many flights to airports inside of North America. Conversly, the map of Denver International Airpot shows that Denver connects to almost every major airport in North America, but doesn't have many flights that go abroad. Finally, we can see the travel paths of our own local airport, Buffalo/Niagara. This airport has many less flights than the other two airports mentioned.
Data collected from openflights.org / Map created using the website cartodb.com