KLM: The flag carrier airline of the Netherlands turned 100 in October 2019, making it the oldest airline in continuous operation under the same name.
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Avianca: Originally called SCADTA, Avianca has been the national airline of Colombia since it was founded in 1919.
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Qantas: With its distinctive "Flying Kangaroo" logo, Qantas was founded in 1920 and is Australia's largest airline and one of its best known brands globally.
Qantas
Aeroflot: Once the largest airline in the world, Aeroflot dates back to 1923 and was originally named Dobrolet.
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Czech Airlines (CSA): The national airline of the Czech Republic turned 100 in 2023.
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Finnair: The flag carrier and largest airline of Finland transported 9.1 million passengers in 2022.
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Air Serbia: The national airline of the Republic of Serbia serves more than 40 destinations across Europe, the Mediterranean and Middle East.
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Delta Air Lines: Founded in 1924,Delta is the oldest airline still operating in the US and the sixth-oldest in the world.
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Iberia: Iberia was the first airline to fly between Europe and South America.
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British Airways: British Airways celebrated its centenary in 2019, even though it was founded in 1974. That's because it marks its history through predecessor airlines going back to August 1919 and the world's first international scheduled service.