11 Most Expensive Airports Ever Built in the World

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8. Denver International Airport, Colorado, USA

Designed to cover 54 square miles, the Denver International Airport went $2 billion over budget before it got opened. Right now, the $4,8 billion worth airport is going to rise, as the project of extending and building additional terminal is expected to start soon. The cost will be around $500 million. Around 53 million passengers traveled via this airport in 2014.
Denver

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