The thoracic duct empties the chylomicrons into the bloodstream via the left subclavian vein.
From the en.wikipedia.org
Lymph is collected by a system of small lymphatic vessels and directed to the thoracic duct, which drains into the left subclavian vein where lymph rejoins the systemic blood circulation.
From the en.wikipedia.org
Each jugular lymph sac retains at least one connection with its jugular vein, the left one developing into the superior portion of the thoracic duct.