Now Lufthansa is getting upset at their passengers for using the hidden city reality to save money.
But on the way home he missed his flight from Frankfurt to Oslo, according to a report from CNN, opting instead to book another ticket from Frankfurt to Berlin.
The pricing strategies for "network carriers" such as Lufthansa, Air France and British Airways is underpinned by charging less for the more flights passengers take in one booking.
Lufthansa - one of the world's largest airline companies - has been granted permission to appeal after an original ruling found in the passenger's favour, it has been reported.
The airline says that the passenger exploited the ticketing system which places a premium on non-stop flights and got a bargain by buying a multiple-stop ticket.
In an interesting twist, Lufthansa has filed a lawsuit against a passenger for leveraging a ploy that seasoned flyers use to cop cheaper fares.
Lufthansa saw this as a violation of their terms and conditions and is seeking €2,112 (around $2,385) in compensation.
According to court documents filed late previous year, the German airline believes the passenger purposely missed the last leg of his connecting flight from Seattle to Oslo.
In November a Spanish court ruled that Iberia passengers could not be punished for 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 case was thrown out in 2015 after the judge in the Northern District Court of IL said the court didn't have jurisdiction over the case because Zaman didn't live or do business in that city.
Its website states: "Our flights are so cheap, United (Airlines) sued us... but we won".
"Hidden city" ticketing was popularized by the airfare site Skiplagged - which promises to help people find tickets that are up to 80 percent less expensive than the prices elsewhere.
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