The largest hubs for air travel in the continent are London, Frankfurt, Paris, Madrid, Brussels, and Amsterdam. These places have connecting links to all parts of Europe. However, almost all European cities have direct long-distance connectivity to some destination or the other. For instance, Vienna has a strong network of connecting flights to Eastern Europe as well as Middle East. Helsinki is the closest place geographically to commute from Eastern part of Asia. There are smaller airports from where you can fly between cities. If you are carrying all your documents you will be able to fly without any issue.