|Date of birth||14 February 1992|
|Place of birth||Athens, Greece|
|Height||1.83 m (6 ft 0 in)|
|Playing position||Right back, Midfielder|
|2011–2012||→ Thrasyvoulos (loan)||29||(5)|
|2014||→ Aris (loan)||8||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 11 February 2017.
Valentinos Vlachos started his professional career in Kavala. In 2011 he signed a three year contract with Greek giant club AEK Athens. Immediately he signed on a loan from the club with Thrasyvoulos playing in Football League.After a fruitful year in the second league, he returned to AEK Athens playing for the 2012/13 season. 
On June 2013, the Greek midfielder Valentinos Vlachos was very interested in the idea of joining Club Bruggedue to the bankruptcy of his former club AEK Athens which relegated for first time in its history.  After six months, in January 2014, Club Brugge formalized the loan rights for Valentinos Vlachos until the end of the season at Aris. Greek player arrived last summer from AEK Athens as a free transfer. Vlachos is the second Greek player authorized to return home after Spyros Fourlanos, who arrived last May from Panathinaikos. Both players have not played any league match.  On 31 December 2014 Valentinos Vlachos signed a one and half years' contract with the Greek side club Panionios.
|Club||Season||SuperLeague||Greek Cup||Champions League||Europa League||Total|
- "O Βαλεντίνος Βλάχος επιστρέφει στην ΑΕΚ από το Θρασύβουλο Φυλής". soccerfame.gr.
- "Valentinos Vlachos aurait un accord avec Bruges". walfoot.be. 14 June 2013.
- "Le FC Bruges prête le Grec Valentinos Vlachos à l'Aris Salonique". sudinfo.be.
- ""Κυανέρυθρος" ο Βλάχος". sport24.gr. 31 December 2014.