He briefly enjoyed a political career, being elected to the House of Commons by the narrowest majority under universal franchise and serving for a single term as a supporter of National Labour.
[4] Up until the political crisis of 1931, Flint had been a member of the Labour Party, but he followed Ramsay MacDonald and supported the creation of the National Government.
[10] At the end of the fifth recount, the Returning Officer declared Flint elected by a majority of two votes over the sitting Labour MP.
In February 1933 he joined a delegation of National Labour MPs to the Minister of Health concerning the Government's Housing and Rent Restriction Bills.
[13] In April 1934 Flint made a speech in support of the Road Traffic Bill, calling for cyclists to carry compulsory lamps.
[16] He continued his practice at the Bar, and in January 1952 represented the Conservative candidate for Lichfield and Tamworth in an action complaining of assault by a Labour Agent; Flint won damages for his client.