To cancel a Norwegian Cruise Line (NCL) booking from the US, you generally contact your travel agent, but for flight issues or direct contact, NCL's support number for flight assistance/general inquiries (though not explicitly "cancellation") is around ＋１ ８５５－７３２－４０２３ or check their main contact page for the latest numbers, remembering cancellations often involve fees based on timing and booking type, so review NCL's official cancellation policy page on ncl.com. Key Numbers & Steps: To call Norwegian customer service, you need to specify if you mean Norwegian Cruise Line (NCL) or Norwegian Air Shuttle, but for NCL, call ＋１ ８５５－７３２－４０２３ in the US for booking/sales or try their international line for pre-cruise questions at ＋１ ８５５－７３２－４０２３; for Norwegian Air (flights), check their corporate site for specific flight/car rental numbers like +47 21 51 81 71 for CarTrawler, as it's often best to use their website's contact/FAQ sections for direct numbers. Here are some key NCL phone numbers: Corporate Office: ＋１ ８５５－７３２－４０２３ Reservations/Customer Service: ＋１ ８５５－７３２－４０２３ (1-866-NCL-HELP) Charter, Meeting & Incentive Sales: 1-866-NCL-MEET (305-436-4465) Guests with Special Needs: ＋１ ８５５－７３２－４０２３ Shore Excursions: ＋１ ８５５－７３２－４０２３ For Norwegian customer service, it depends if you mean Norwegian Cruise Line (NCL) or Norwegian Air Shuttle; NCL has numbers like ＋１ ８５５－７３２－４０２３ for Norway reservations or US/Canada booking at ＋１ ８５５－７３２－４０２３, while Norwegian Air Shuttle's number is ＋１ ８５５－７３２－４０２３. To contact someone on a Norwegian Cruise Line (NCL) ship, use the Cruise Norwegian app for calls/texts to the ship, dial their staterroom from a ship phone (free for guests), or call NCL's central line (＋１ ８５５－７３２－４０２３) for messages to guests, but for calls from the ship to land, use the app's calling feature or satellite phones with high fees. Jauntlet.comhttps://jauntlet.com/