"Lina and Scott are going their separate ways. They ended on a good note as friends, and Lina ended it with him," a source said.
It was the first romance for the father of three, 32, since his split with Kourtney Kardashian six months ago.
The "Keeping Up With the Kardashians" star ended her nine-year relationship with Disick, 32, after he was spotted getting cozy with ex Chloe Bartoli in the South of France over the summer.
Kardashian, 36, and her ex are parents of three kids, Mason, 6, Penelope, 3, and Reign, 12 months.