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Marathon is served by Key West Intl Airport (Key West, FL)
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- Marathon is 43 mi from Key West Intl Airport (Key West, FL).
- Key West Intl Airport (Key West, FL)
- Right now, 13 airlines operate out of Key West Intl Airport.
- Key West Intl Airport offers nonstop flights to 9 cities.
- Every week, at least 322 domestic flights and 0 international flights depart from Key West Intl Airport.
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