S39 may refer to:
Aviation
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Blériot-SPAD S.39, a French reconnaissance aircraft
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Letov Š-39 __NOTOC__
The Letov Š-39 was a sport aircraft produced in Czechoslovakia during the 1930s. It was a conventional, parasol-wing monoplane with fixed tailskid undercarriage, and seating for the pilot and passenger in tandem, open cockpits. Becaus ...
, a Czechoslovakian sport aircraft
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Prineville Airport
Prineville Airport is a public use airport located three nautical miles (6 km) southwest of the central business district of Prineville, in Crook County, Oregon, United States. According to the FAA's National Plan of Integrated Airport System ...
, in Crook County, Oregon, United States
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Sikorsky S-39, an American flying boat
Other uses
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S39: Wear eye/face protection, a safety phrase
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New Jersey Route 68, designated Route S39 until 1953
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Sulfur-39, an isotope of sulfur
* , a submarine in the United States Navy
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