The moment when a vacation turns into a problem is often the monotonous noise of a conveyor belt that keeps moving up and down without bringing the expected suitcase. Other passengers leave with their luggage, while only a few suitcases that no one recognizes remain on the belt.
But in most cases, the suitcase is not missing. It may have been left at the departure airport, missed a connection with the next flight, been loaded onto another plane, or continued on its journey to its destination without its owner.
According to the SITA Baggage IT Insights 2026 report, in 2025, about 5 billion people traveled by air and 24 million pieces of baggage were handled improperly, including delayed, damaged or lost bags. The figure fell by 23 percent in a year, but the cost to the airline industry was still about $6.3 billion.
The invisible journey of a suitcase
From the moment it is handed over at check-in, the suitcase is given a tag with an identification code that links it to the passenger, the flight, and the destination. It then passes through a network of conveyor belts, scanners, automated systems, and employees.
According to IATA rules, luggage must be tracked at several key points: when handed over by the passenger, when loaded onto the aircraft, during transfer, and when delivered to the destination. Problems arise especially during transit, where even a delay of a few minutes can mean that the passenger can catch the next plane, while the suitcase cannot.
When luggage does not show up, the passenger must complete a Property Irregularity Report (PIR) before leaving the airport. The data is usually entered into WorldTracer, the global system that compares passenger reports with suitcases found at different airports.
The search is not based solely on the tag code. The itinerary, the passenger's last name, the type of bag and its description are also used. When identified, it is classified as a 'rush bag' and sent to the passenger's destination, usually on the first available flight and then by courier.
Devices like AirTag can help indicate the approximate location of a suitcase, but they do not replace official procedures and do not give the passenger the right to enter restricted areas of the airport.
After 21 days, the suitcase is considered lost.
The Montreal Convention stipulates that a piece of luggage can be considered lost after 21 days from the estimated date of arrival. This does not mean that on the 22nd day the suitcase is automatically thrown away or sold.
The airline can continue the search and transfer the suitcase to central warehouses. If the tag has come off, employees can open it to look for documents, addresses, receipts or other information that could lead to the owner.
Therefore, a letter with your name, phone number, and email inside your suitcase can be very useful if the outer label is lost.
From lost suitcase to auction
When all attempts to identify the owner fail, the fate of the suitcase varies depending on the country and company. It can be sold to specialized operators, auctioned, donated, recycled, or destroyed.
One of the most well-known cases is Unclaimed Baggage in Alabama, USA. The company buys suitcases that are considered definitively lost, without knowing in advance what they contain.
They are opened, checked, and sorted. Clothes are cleaned, electronics are hidden, and items that can be sold are put on the market.
Although the idea of a "mystery suitcase" conjures up fantasies of jewelry and luxury items, most luggage contains quite ordinary things: clothes, shoes, chargers, souvenirs, and hygiene products.
So a suitcase can disappear from its owner's life without actually disappearing. For weeks it can be scanned, photographed, moved and searched, until it finally loses contact with the person who packed it and becomes a cost to the company, an insurance issue or an item purchased by a stranger.