London Stansted Airport began life as a US Army Air Force World War Two base in 1943
Airport managing director Gareth Powell said: "It's amazing to look back and acknowledge those early efforts have ultimately culminated in the Stansted Airport we see today."
The airport is running a competition on social media offering eight people the chance to win £100 travel vouchers, to celebrate the landmark.
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The site was home to the USAAF Eighth Air Force
MAG London Stansted Airport
The base was handed back to the Civil Aviation Authority after World War Two and was home to many of Britain’s charter airlines
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The first commercial jets arrived in the early 1960s
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Queen Elizabeth II opened the £400m new Norman Foster-designed terminal building in 1991, which increased the passenger capacity from two to eight million a year
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Former US President Barack Obama flew in and out of Stansted
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US President Donald Trump also flew into Stansted
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London Stansted Airport is on the other side of the M11 motorway from Bishop's Stortford in Hertfordshire, but within the Uttlesford district of Essex
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Davide Sanclimenti and Ekin-Su Culculoglu, winners of the reality ITV2 show Love Island, were welcomed at Stansted in 2022
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London Stansted Airport plans to build a new terminal building and increase capacity from 26 million to 43 million passengers per year