S39 may refer to:

Aviation

* Blériot-SPAD S.39, a French reconnaissance aircraft *

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 *

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 Syste ...

, in Crook County, Oregon, United States *

Sikorsky S-39 The Sikorsky S-39 is an American light amphibious aircraft produced by Sikorsky Aircraft during the early 1930s. The S-39 was a smaller, single-engine version of the S-38. Operational history Spirit of Africa Filmmakers Martin and Osa Johnson u ...

, an American flying boat

Other uses

* S39: Wear eye/face protection, a safety phrase *

New Jersey Route 68 Route 68 is a state highway located in Burlington County in the U.S. state of New Jersey, serving as the main connector between the New Jersey Turnpike and the Fort Dix entity of Joint Base McGuire–Dix–Lakehurst (JB MDL). It runs from Co ...

, designated Route S39 until 1953 * Sulfur-39, an isotope of sulfur * , a submarine in the United States Navy {{Letter-NumberCombDisambig