I actually ran into this, and still have questions myself, when researching whether or not NCL would have the option of sticking my DH and me on a red-eye or "stupid amount of stops" flight, for my regional airport to MCO, which is an 8 hour drive, but has zilllions of nonstops/commuters.
The answer, my friend, is, maybe, probably yes, so you/we can expect all kinds of fun layovers!
Air Sea Program | Cruise Line Transfers, Air Ticketing, Charges & Cruise Documentation | Norwegian Cruise Line (ncl.com)
"Terms are governed by the individual air carrier ticket contract and NCL's Guest Ticket Contract. NCL reserves the right to choose the air carrier, routing, and city airport from each gateway city. Also, NCL reserves the right to substitute commuter service and/or charter air service for scheduled air carriers without prior notice. All terms and conditions governing NCL's Air Sea Program and the air transportation arranged by NCL will equally apply to such chartered air service. Flight schedules may not, in some cases, be the most direct, and connections, layovers and involuntary overnights in route may be necessary depending on the departure city and final destination . The cost of such overnight arrangements (food, lodging, transfers and items of a personal nature) will be the passengers' responsibility. Actual flight schedules, fare basis and applicable rules cannot be committed until airline tickets are issued. Airline tickets are issued on fares that are capacity controlled and highly restrictive. These airline tickets may not be reissued or exchanged for another carrier or routing. Airfares include all fees, surcharges, and government taxes."
AFAIK, you won't receive your flight info til about 30 days out. For example, we sail in 39 days, and are still patiently waiting on the flight info. Yay. 🙂 Still excited though!