Transport in Denmark is developed and modern.^{[clarification needed]} The motorway network covers 1,111 km while the railway network totals 2,667 km of operational track. The Great Belt Fixed Link (opened in 1997) connecting the islands of Zealand and Funen and the New Little Belt Bridge (opened in 1970) connecting Funen and Jutland greatly improved the traffic flow across the country on both motorways and rail. The two largest airports of Copenhagen and Billund provide a variety of domestic and international connections, while ferries provide services to the Faroe Islands, Greenland, Iceland, Germany, Sweden, and Norway, as well as domestic routes servicing most Danish islands.

In 2011, a total of appr. 28 million passengers used Danish airports.

Copenhagen Airport is the largest airport in Scandinavia, handling approximately 29m passengers per year (2016). It is located at Kastrup, 8 km south-east of central Copenhagen. It is connected by train to Copenhagen Central Station and beyond as well as to Malmö and other towns in Sweden.

For the west of the country, the major airport is Billund (3m passengers in 2016) although both Aalborg (1.4m passengers in 2011) and Aarhus (591.000 passengers in 2011) have smaller airports with regular connections to Copenhagen.

Denmark's main airports are:

Other airports include:

Being an island state with a long coastline and always close to the sea, maritime transport has always been important in Denmark. From the primitive dugouts of the Stone Age to the complex designs of the Viking ships in the Viking Age, often built to exactly facilitate large scale cargo and passenger transportation. Denmark also engaged in the large scale cargo freights and slave transports of the European colonization endeavours in the Middle Ages and operated several smaller colonies of its own across the globe by the means of seafaring.

Today Denmark's ports handle some 48 million passengers and 109 million tonnes of cargo per year.