Escadrille Spa.90 began by combining two existing formations, N504 and N507, in early 1917.

[1] On 22 April 1918, the squadron was renamed Escadrille Spa.90 when it re-equipped with SPAD fighters.

On 9 November 1918, the unit was Cited in orders for having destroyed 10 German airplanes and 14 observation balloons.

However, its total victory score for the war was 13 airplanes and 22 balloons.

This article about a specific French military unit is a stub.