1924 was the most successful year of Armand Blanchonnet when he was in Paris in the road race with ten minutes won at the Olympic Games gold medal ahead of the runner-up Rik Hoevenaers from Belgium and also in the team competition won the gold medal. In the team competition, the times of the athletes were added in the ITT, and all ranked in the top ten because of the large projection of Blanchonnet and since his teammates, the French in the final bill had 16 minutes ahead of the Belgian team. In the same year Blanchonnet won at the World Championships, also in Paris, ranked third.
By 1932 Blanchonnet appeared only sporadically in the results. So again it was made in 1929 at the Critérium des As France in second place, and also the French Championship in 1931 he was able to decide for themselves and thereby make very good riders such as Francis Pélissier and André Leducq behind. In 1930 he won jointly with Onésime Boucheron rail competition Prix Dupré - Lapize in Paris. The big successes, however, did not stand on.
1936 ended Blanchonnet his cycling career and founded a prison and accident insurance for cyclists.