S63

S63 may refer to:

Aviation

 * Savoia-Marchetti S.63, an Italian flying boat
 * Sikorsky S-63, an American helicopter
 * Skyharbor Airport, in Dallas County, Alabama, United States

Other uses

 * S-63 (encryption standard), securing electronic navigational chart data
 * S63 (Long Island bus), United States
 * BMW S63, an automobile engine
 * INS Sindhurakshak (S63), a submarine of the Indian Navy
 * Mercedes-Benz S63 AMG, a German sedan
 * S63: In case of accident by inhalation: remove casualty to fresh air and keep at rest, a safety phrase
 * SPANISH SUBMARINE Marsopa
 * S63, a postcode district for Rotherham, England