Yes, a 14-year-old can fly alone with a Norwegian. Moreover, for them booking a flight can be quite easy as they have the option to use Norwegian Unaccompanied Minor service if it is needed. Apart from that, airlines recommend parents to bring important documentation to drop them off and pick them up from the airport. For more information, you can reach Norwegian Airlines customer service at 011 47 21 49 00 15 or 1-800-283-2017 (OTA-Skip Waiting).