
die Fluglinie
airline
A company that offers commercial flights for passengers or freight; an airline company.
Wir haben bei einer günstigen Fluglinie gebucht, um nach Portugal zu fliegen.
We booked with a budget airline to fly to Portugal.
airline
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airline
A company that offers commercial flights for passengers or freight; an airline company.
Wir haben bei einer günstigen Fluglinie gebucht, um nach Portugal zu fliegen.
We booked with a budget airline to fly to Portugal.
The word is made up of 'Flug' (flight, from fliegen — to fly) and 'Linie' (line). So it figuratively describes a line or route that is flown, and the company that operates it.
Diese Fluglinie bietet Direktflüge nach New York an.
This airline offers direct flights to New York.
Common verbs in connection with 'Fluglinie' (airline) are 'mit einer Fluglinie fliegen' (to fly with an airline) and 'bei einer Fluglinie buchen' (to book with an airline). It is also often described with adjectives such as 'günstig' (cheap / budget), 'bekannt' (well-known), or 'sicher' (safe).
Ich fliege immer mit derselben Fluglinie.
I always fly with the same airline.
Pay attention to the prepositions: You fly 'mit' (with) an airline, but you book a flight 'bei' (with / through) an airline.
Er hat seinen Flug direkt bei der Fluglinie gebucht.
He booked his flight directly with the airline.
airline
Airline and Fluglinie can both refer to a company in the air transport industry. In this meaning, they are largely interchangeable, so there is no fixed difference in the organization they refer to. Choose Airline as the familiar international term or Fluglinie as the German synonym.

Die Fluglinie bietet täglich mehrere Flüge nach Wien an.
The airline offers several flights to Vienna every day.
Die Airline bietet täglich mehrere Flüge nach Wien an.
The airline offers several flights to Vienna every day.