The airline is seeking payment from the unnamed traveller, who it believes booked the ticket as part of a widely used hack of buying cheaper flights by avoiding the premiums placed on non-stop options.
The hack took advantage of the airlines' ticketing system, whereby multi-stop journeys are typically cheaper than non-stop flights.
Network carriers such as Lufthansa set their prices based on charging less for more flights.
Lufthansa has taken a passenger, who didn't show up for the last leg of his ticketed journey, to court in an apparent bid to clamp down on "hidden city" ticketing.
A Lufthansa spokesperson told Simple Flying: 'As this is a running court case, we do not comment this case at this stage. The cheat is known as "skiplagging", with a passenger booking a flight from A to C via B, but with the intention of never making their B to C flight.
The only caveat is customers have to take hand-luggage so any hold bags are not sent onto the final destination.More news: Mitch McConnell to Force Green New Deal Vote to 'Rattle' Democrats
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Another risk is that if you miss the first leg of a flight you will be considered a no-show for the others.
Germany's largest airline is suing a penny-pinching passenger - in a first-of-its-kind lawsuit - because he ditched his flight at a layover city to save some cash, according to reports Tuesday.
"Should you change your carriage without our agreement, we will assess the correct price for your actual travel", says Etihad in its terms and conditions.
In the past, travellers were nearly always unlikely to be chased up for exploiting the system, despite the warnings.
For example, if you booked a New York - London - Bangkok flight but tried to join the journey out of London, you would have already nullified the ticket by not boarding in New York.