The 34-year-old reality star was seen arriving at LAX, keeping his eyes covered with a pair of shades.
Just yesterday, Scott was seen partying hard with a topless woman in London, days after he had a hookup marathon with seven other women in Cannes.
From what insiders told Radar, Scott has been on a mission to get revenge on his baby mama after she dumped him for new boytoy, Younes Bendjima.
Sources said the off-the-wagon star flew to Cannes last week just to stay blocks away from Kourtney and Younes rented villa. He was deetermined to get her attention by parading all his women around in front of cameras, which included Bella Thorne, Sofia Richie, Ella Ross, and many other mystery babes.
Despite Kourtney brushing off Scott's sad attempt to make her jealous, close friends of the family told Radar his desperation has gotten so bad that he's now threatening Kourtney's new man.
"Scott called Younes and told him that if he sees him he is going to 'kick his a** for stealing Kourtney from him," a source told Radar.
"Younes obviously was bothered by this, but he is not going to back off," the insider added. "He says he's in love with Kourtney." Do you think Scott is back in L.A. to get Kourtney back? Tell us your thoughts below!
We pay for juicy info! Do you have a story for RadarOnline.com? Email us at email@example.com, or call us at (866) ON-RADAR (667-2327) any time, day or night.