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Today in Chicago History: The ‘L’ extension to O’Hare International Airport is opened

3 verified updates • corroborated by 2 independent sources • tracked since September 3, 2026

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  04:31 AM 1 source: Chicago Tribune

  Today in Chicago History: The ‘L’ extension to O’Hare International Airport is opened
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  10:30 AM 1 source: chicagotribune.com
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  11:31 AM 1 source: Chicago Tribune