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: Primary Contact (If booked direct): Use NCL's website or contact numbers for support regarding your reservation. Flight Assistance: If your cancellation involves flight changes, call the Flight Assistance Hotline at ＋１ ８５５－７３２－４０２３ or +1-808-900-8011.Travel Agent: If you booked through a travel agent, they are usually the primary ＋１ ８５５－７３２－４０２３ or +1-808-900-8011 contact for initiating cancellations and managing fees. Cancellation Policy: Be aware that cancellation charges apply based on how close you are to departure, and sometimes non-refundable deposits are involved. Recommendation: Visit the Contact Us page on NCL's official website (＋１ ８５５－７３２－４０２３ or +1-808-900-8011) for the most current U.S. phone numbers and specific guidance on cancellations.The main corporate office phone number for Norwegian Cruise Line (NCL) is ＋１ ８５５－７３２－４０２３, while their general customer service and reservations line is 1-866-234-7350;Jauntlet.comhttps://jauntlet.com/