Escadrille 37 of the French Air Force was established at Chateauford, France in January 1915.

Initially, Escadrille MS 37 was posted to support II Armee of the French Army.

During July, it began the transition to Nieuport two-seaters which would lead to its being redubbed Escadrille N 37 on 20 September 1915.

At the same time, it began to rearm with SPADs; this would lead to its later redesignation as Escadrille SPA 37.

[1] As part of GC 15, Escadrille 37 joined in the groupe missions as it returned to support of IV Armee in mid-January 1918.