- Chicago (CHI) Louisville (SDF)
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1–13 Non-stop flights per dayat least 1h 10minfrom $204 - Chicago O'Hare (ORD) Louisville (SDF)
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1–13 Non-stop flights per dayat least 1h 10minfrom $204 - Washington DC (DCA) Louisville (SDF)
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1–7 Non-stop flights per dayat least 1h 43minfrom $300