The Norwegian Air pet policy is as follows:
Small cats or dogs can travel in the cabin on domestic flights within Argentina and on flights within Schengen and/or EU (excl. UK and Ireland).
Cats and dogs can travel in the cargo hold on the following flights: flights to/from Svalbard (dogs only); flights within Schengen and/or EU (UK and Ireland excluded); and domestic flights within Argentina.
Cats and dogs can travel in the cargo hold on connecting flights within Norway (excluding to/from Svalbard) via Oslo Gardermoen, Bergen Flesland and Trondheim Værnes.
If your pet is a brachycephalic (snub-nosed) breed and you still wish to travel on Norwegian, you will be asked to sign a release form at check-in acknowledging the risks associated with air travel for your pet.
If you’d like to bring your dog to or from Svalbard you need to apply for a permit from the Norwegian Food Safety Authority.
Taking a pet to a foreign country involves preparation and planning far in advance of your departure date. Requirements for pet travel to a foreign country are set by the destination country. If you are you traveling to another country and bringing along your pet you’ll need to meet the animal health requirements of the country you are visiting.
More information on the Norwegian Air pet policy