In most cases, if a flight only manages to sell one ticket, the airline is likely to evaluate the situation and consider various factors before making a decision regarding the flight. While it is ultimately up to the airline’s discretion, here are some possible scenarios:

1. Operational feasibility: The airline may assess the operational feasibility of operating the flight with just one passenger. Factors such as the aircraft type, fuel costs, crew availability, and airport fees may be considered. If the costs outweigh the benefits, the airline may decide to cancel or reschedule the flight.
2. Cost considerations: Operating a flight involves various fixed and variable costs, including fuel, maintenance, staffing, and ground handling expenses. If the revenue generated from a single ticket does not cover these costs or would result in a significant loss, the airline might choose to cancel the flight.
3. Passenger reaccommodation: If the airline decides to cancel the flight, they would typically make arrangements to rebook the passenger on an alternative flight. This ensures that the passenger reaches their destination while minimizing disruption.
4. Exceptional circumstances: There could be exceptional circumstances where the flight proceeds even with just one passenger. For example, if the flight is part of a critical service (medical transport, government-related travel) or if there are contractual obligations to fulfill, the airline may choose to operate the flight despite low passenger numbers.

It’s important to note that the airline’s policies, regulations, and business considerations may vary, and each situation is assessed individually. Airlines prioritize maximizing operational efficiency and minimizing financial losses while ensuring passenger satisfaction and safety.