[Answer] What is the oldest-operating commercial airline?

Step 1 : Introduction to the question "What is the oldest-operating commercial airline?"

...1. KLM Royal Dutch Airlines 2. Qantas 3. Delta 4. British Airways

Step 2 : Answer to the question "What is the oldest-operating commercial airline?"

KLM Royal Dutch Airlines - Legally known as Koninklijke Luchtvaart Maatschappij, the Royal Dutch Airlines or KLM is the oldest-operating commercial airline in the world. Founded in 1919, KLM's first flight took off on May 17th, 1920. In that first year, the airline only transported 345 passengers. Today, however, KLM can transport more than 400 passengers on a single flight! We've come a long way. \n\n\n

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