The ambiguity of the whole operation is very confusing. They present one brand but have 5 operating certificates with 5 callsigns. NAI, the most dubious of them all, has closed all their domiciles in the US and has no more flights operating to/from the US. But I’m sure that a passenger flying on NAI can connect on another Norwegian flight and end up landing in the US, and then connecting on a jetBlue flight.