airline
Fluggesellschaft is the German term for an airline. It is a compound word made up of Flug (flight) and Gesellschaft (company). It is used to refer to any company that provides air transportation services, including commercial airlines and charter services.
Lufthansa is a very well-known airline.
In this sentence, the term Fluggesellschaft, which translates to airline, is used to talk about Lufthansa, a real, well-known German airline.
The airline has canceled the flight.
Here, 'Fluggesellschaft' is used in a broader sense to talk about any airline in general. This phrase might be used to discuss changes in travel plans due to cancellations.
Ryanair airline has low prices.
In this example, Fluggesellschaft is used to refer specifically to Ryanair, a low-cost airline. The sentence talks about the affordability of this particular airline.