The gas interconnector between Denmark and Poland (Baltic-Pipe) is receiving €33 million (£29m) and the other between Poland and Lithuania (GIPL) is being granted €276 million (£242m).
Both ventures are flagship EU projects and key to addressing the energy challenges facing the Eastern Baltic Sea Region and the Central-Eastern Europe.
The Baltic-Pipe is expected to enhance diversification of gas sources and increase competition while GIPL is to help bring an end to the isolation of the gas system of the Baltic Sea region and integrate it to the internal energy market.
Climate Action and Energy Commissioner Miguel Arias Canete said: “A solid, modern and strategic energy infrastructure is a crucial piece of our Energy Union and the Commission is committed to strengthen it during its mandate.
“By supporting gas interconnections…we are increasing diversification of sources and energy security for the region, whilst ending the Baltic Sea energy isolation. This is what European solidarity on energy is all about, one which provides real benefits and added-value to our citizens.”