Police spokesman Morten Pettersen said a sixth person, also Swiss, was dug out alive and taken to a local hospital after Monday's snowslide near Tromsoe on Norway's Arctic coast.
The six were part of a group of 12 people out skiing in the area when the avalanche struck near Sorbmegaisa mountain, police said.
The victims were wearing avalanche transceivers which guided about 30 rescuers digging through the snow. Police and military helicopters were also sent to the site.
Police said avalanches are common in the area.