S39
# S39

S39 may refer to:

## Aviation

* Blériot-SPAD S.39, a French reconnaissance aircraft
* Letov Š-39, a Czechoslovakian sport aircraft
* Prineville Airport, in Crook County, Oregon, United States
* Sikorsky S-39, an American flying boat

## Other uses

* S39: Wear eye/face protection, a safety phrase
* New Jersey Route 68, designated Route S39 until 1953
* Sulfur-39, an isotope of sulfur
* USS S-39 (SS-144), a submarine in the United States Navy
