Breinesflya is a coastal plain at the western coast of Sørkapp Land at Spitsbergen, Svalbard. It has a length of about twelve kilometers, extending from the river of Vinda to Raksodden.[1] Slaklielva from Gråkallbreen through Slaklidalen flows across Breinesflya,[2] as does Lidelva coming from Liddalen.[3] At the northeastern side of the plain are the mountains Wiederfjellet and Lidfjellet.