Forecast demand can differ from actual demand
Market studies estimate passenger volumes and fares, but travelers may not behave as expected once the service launches. Small forecasting errors can matter on high-cost routes.
Competitors can change the market after launch
An incumbent may add frequency, discount fares or improve connections. The economics originally modeled for the new route can deteriorate quickly.
Costs can move in the wrong direction
Fuel, airport charges, exchange rates and staffing costs can change after a launch decision is made. A route with a thin margin is especially vulnerable.
Aircraft shortages force network choices
Delivery delays, maintenance problems or fleet retirements can reduce available capacity. Airlines may cancel weaker routes to protect more valuable parts of the network.
Some launches are intentionally experimental
A carrier may start with seasonal or low-frequency service to test demand. Ending the route later can be a normal result of that trial rather than evidence of operational failure.
Strategic priorities change
Mergers, new hubs, alliance shifts or management changes can redirect capacity. A route can lose its network role even if its local performance has not collapsed.
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