The Lavochkin La-150 was its first response to a 1945 order to build a single-seat jet fighter using a single German Junkers Jumo 004 turbojet from the Me 262.

It was designed to use the new turbojet based on the Rolls-Royce Nene in response to a 1946 request for an advanced swept-wing jet fighter capable of transonic performance.

Trials were continued with an improved second prototype, designated Aircraft 174D, which underwent State Acceptance Tests from August to September 25, 1948.

The type was ordered into production in September 1948, even while Aircraft 174D was undergoing flight trials, and given the official designation La-15 in April 1949.

[1] The La-15 had a barrel-like fuselage, shoulder-mounted swept wings with 6 degrees anhedral, and stabilizers mounted high on the fin, almost a T-tail.

[1] The La-15 was tested operationally by the 192nd Fighter Wing, based at Kubinka from 19 March 1949, and began appearing in front-line combat units later the same year.