All the large cities and towns have airports catering for both international and domestic flights. In fact, there are more than 50 airports in Norway serviced through regular routes, making even remote places such as the Lofoten Islands, the North Cape and Svalbard easily accessible by plane. However, you should be prepared to maybe change planes once or twice in order to reach your final destination.
Norway is the country in Europe with the most airline trips per capita, and the routes from Oslo to Trondheim, Bergen, and Stavanger are all amongst the ten busiest in Europe.
A long and craggy country, Norway has not always been as easy to get around as we'd like it to be. But modern conveniences have made it much easier than it once was. These days, there are trains, boats, roads, and a network of small airports, all making it quite practical to see any part of the country.
NSB, the Norwegian State Railways, operates most passenger train services in Norway, and has a well-developed railway network stretching from Kristiansand in the south to Bodø above the Arctic Circle.