The SNCAO 30 was a French single-engined monoplane flying boat two-seat trainer.

The resultant design, which was renamed SNCAO 30 when Loire-Nieuport was nationalised and became part of Société nationale des constructions aéronautiques de l'ouest (SNCAO), was a single-engined pusher monoplane of wooden construction, with the crew of two sitting side-by side in an open cockpit.

[1] The first prototype, built at the SNCAO factory at Saint Nazaire, made its maiden flight on 13 September 1938, these resulting in a number of modifications, including adding dihedral to the outer wing panels, placing a cowling around the engine and replacing its twin tail with a single large fin, the prototype flying again in this form on 21 September 1938, with a second prototype flying on 19 May 1939.

[2] The aircraft was disappointing, however, being nose-heavy and with its engine suffering from severe vibration and overheating.

[3] Despite these problems, as there was no better alternative,[3] an order for production of 12 aircraft, designated SNCAO 300, was placed on 19 March 1940.