Born in Vostitsa in c. 1786 to Sotirakis Londos, he was initiated into the Filiki Eteria in 1818, and was one of the first military leaders to raise the banner of revolt in the Peloponnese during the Greek War of Independence.

On 26 January 1821, under the ruse of a land dispute between landowners, Londos and other leading landowners, primates and bishops of the Filiki Eteria, including Andreas Zaimis and Germanos of Patras, met Papaflessas at the Monastery of Archangels Michael and Gabriel in Vostitsa to discuss plans for an uprising against the Turks.

At first, skeptical of Papaflessas's rhetoric for general uprising, Londos and the other leaders eventually raised the banner of independence on 10 March 1821, at the Monastery of Agia Lavra.

[2] In July 1822, at Akrata, a force of Greek fighters under Londos, Zaimis and Petimezas surrounded and attacked a group of 4,000 Turks marching to Patras after their defeat at the Battle of Dervenakia.

[2] Following Greek independence, he became involved in the September 3 Movement that finally secured a constitution for the people of Greece.