Orestis Karamanlis has received awards at the following contests
- Ars Electronica Forum Wallis, Leuk (Switzerland): 2016
- Concorso Internazionale di Composizione Città di Udine, Udine (Italy): 2012
- Concours biennal de composition acousmatique Métamorphoses, Ohain (Belgium): 2012
- Concours international de la musique électroacoustique SIME, Lille (Nord, France): 2015
- Giga-Hertz-Preis, Karlsruhe (Baden-Württemberg, Germany): 2010
- Musica Nova International Competition of Electroacoustic Music, Prague (Czech Republic): 2012
- Totem électroacoustique, Montréal (Québec): 2025