The 32-year-old reality star checked out of rehab in Malibu, California, on Wednesday, a source close to Scott tells ET, where he's been staying for the past month.
"He is doing really well," the source says. "Everyone is hoping that his sobriety continues but he is looking great and feeling great."
Scott will continue to receive out-patient treatment to maintain his sobriety.
"The entire Kardashian family is supporting him throughout this, including Kourtney," the source adds.
On Tuesday night, Scott Instagrammed a picture of himself boarding a private plane, sparking rumors that he left rehab. According to our source, he actually left a day later.
"Private aviation is my motivation," he wrote.
But he was much more cryptic about his thoughts on Thursday, when he posted a picture of Brad Pitt and Angelina Jolie from a 2005 W magazine photoshoot. "Feelin some type of way," he wrote.
And he obviously has the support of the Kardashian clan. Scott was spotted getting a visit in rehab from Kris Jenner
and his three kids -- 5-year-old Mason, 3-year-old Penelope and 10-month-old Reign -- on Oct. 25. An eyewitness told ET that the visit lasted two hours, and that Scott "seemed fine, but a bit serious" around Kris.
"Scott sees the kids whenever he wants to," a source also told ET in September
. "Despite all of Scott's addiction problems, he is a great dad and loves those kids with all his heart, and they are obsessed with him."
In a preview for the upcoming season 11 of Keeping Up With the Kardashians
, Scott expressed remorse
about his breakup with Kourtney in July, after nine years together. The longtime couple split after he was snapped canoodling with his ex
, Chloe Bartoli, in Monte Carlo.
"It's been a really hard time, going from like, having all of you guys to having nobody," he tells Kris, Kourtney, and Khloe, as he breaks down in tears.
After Kourtney tells her ex, "You forget what happens when you're on a binge," he confesses, "I f**ked up. I made the worst decision I've ever made in my life."