What is the name of the airline responsible for flying a passenger from a boarding point?

The term that correctly describes the airline responsible for flying a passenger from a boarding point is known as the "Boarding Airline." This designation refers to the specific airline that has the obligation to transport the passenger once they have checked in and boarded the aircraft. It encompasses all operational responsibilities, including accommodating the passenger on the flight and ensuring they arrive at their intended destination.

The other options do not accurately capture this role. "Booking Airline" refers to the airline that sold the ticket, which may not necessarily be the one that operates the flight. "Cancelled Flight" denotes a situation where a flight is not operating at all, thus has no relevance to the question. Lastly, "Carriage" is a general term that defines the transportation of passengers or goods but does not specify which airline is carrying out this service. Therefore, "Boarding Airline" is the most appropriate term in this context.